diff --git a/HISTORY.rst b/HISTORY.rst
index c113ff5..ca0470f 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -1,11 +1,20 @@
 History
 =======
 
-0.6.4 (2010-09-13)
+0.7.0 (2010-09-20)
 ------------------
 
-* Updated unicode export for XLS
-* More exhaustive unit tests
+* Renamed DataBook Databook for consistiency.
+* Export properties changed to methods (XLS filename / StringIO bug).
+* Optional Dataset.xls(path='filename') support (for writing on windows).
+* Added utf-8 on the worksheet level.
+
+
+0.6.4 (2010-09-19)
+------------------
+
+* Updated unicode export for XLS.
+* More exhaustive unit tests.
 
 
 0.6.3 (2010-09-14)
diff --git a/README.rst b/README.rst
index 32d477f..4fe26bd 100644
--- a/README.rst
+++ b/README.rst
@@ -70,7 +70,7 @@ JSON!
 +++++
 ::
 
-	>>> print data.json
+	>>> print data.json()
 	[
 	  {
 	    "last_name": "Adams",
@@ -89,7 +89,7 @@ YAML!
 +++++
 ::
 
-	>>> print data.yaml
+	>>> print data.yaml()
 	- {age: 90, first_name: John, last_name: Adams}
 	- {age: 83, first_name: Henry, last_name: Ford}
 	
@@ -97,7 +97,7 @@ CSV...
 ++++++
 ::
 
-	>>> print data.csv
+	>>> print data.csv()
 	first_name,last_name,age 
 	John,Adams,90 
 	Henry,Ford,83 
@@ -106,8 +106,8 @@ EXCEL!
 ++++++
 ::
 
-	>>> open('people.xls').write(data.xls)
-		
+	>>> data.xls('people.xls')
+
 It's that easy.
 	
     
diff --git a/setup.py b/setup.py
index f9b71ea..c853439 100644
--- a/setup.py
+++ b/setup.py
@@ -18,7 +18,7 @@ if sys.argv[-1] == "publish":
 
 setup(
 	name='tablib',
-	version='0.6.4',
+	version='0.7.0',
 	description='Format agnostic tabular data library (XLS, JSON, YAML, CSV)',
 	long_description=open('README.rst').read() + '\n\n' +
 	                 open('HISTORY.rst').read(),
diff --git a/tablib/core.py b/tablib/core.py
index e97b8a6..f300be6 100644
--- a/tablib/core.py
+++ b/tablib/core.py
@@ -8,7 +8,7 @@
 
 
 import csv
-import cStringIO
+import StringIO
 import random
 
 import simplejson as json
@@ -21,8 +21,8 @@ from helpers import *
 # __all__ = ['Dataset', 'DataBook']
 
 __name__ = 'tablib'
-__version__ = '0.6.4'
-__build__ = 0x000604
+__version__ = '0.7.0'
+__build__ = 0x000700
 __author__ = 'Kenneth Reitz'
 __license__ = 'MIT'
 __copyright__ = 'Copyright 2010 Kenneth Reitz'
@@ -149,29 +149,25 @@ class Dataset(object):
 			self.__headers = None
 
 
-
 	@property
 	def dict(self):
 		"""Returns python dict of Dataset."""
 		return self._package()
 
 
-	@property
 	def json(self):
 		"""Returns JSON representation of Dataset."""
 		return json.dumps(self.dict)
 
 
-	@property
 	def yaml(self):
 		"""Returns YAML representation of Dataset."""
 		return yaml.dump(self.dict)
 
 
-	@property
 	def csv(self):
 		"""Returns CSV representation of Dataset."""
-		stream = cStringIO.StringIO()
+		stream = StringIO.StringIO()
 		_csv = csv.writer(stream)
 
 		for row in self._package(dicts=False):
@@ -180,19 +176,23 @@ class Dataset(object):
 		return stream.getvalue()
 
 
-	@property
-	def xls(self):
+	def xls(self, path=None):
 		"""Returns XLS representation of Dataset."""
-		stream = cStringIO.StringIO()
 
-		wb = xlwt.Workbook()
+		wb = xlwt.Workbook(encoding='utf8')
 		ws = wb.add_sheet(self.title if self.title else 'Tabbed Dataset')
+
 		for i, row in enumerate(self._package(dicts=False)):
 			for j, col in enumerate(row):
-				ws.write(i, j, col.decode('utf8'))
+				ws.write(i, j, col)
 
-		wb.save(stream)
-		return stream.getvalue()
+		if path:
+			wb.save(path)
+			return True
+		else:
+			stream = StringIO.StringIO()
+			wb.save(stream)
+			return stream.getvalue()
 
 
 	def append(self, row=None, col=None):
@@ -227,7 +227,7 @@ class Dataset(object):
 			pass
 
 
-class DataBook(object):
+class Databook(object):
 	"""A book of Dataset objects.
 	   Currently, this exists only for XLS workbook support.
 	"""
@@ -256,7 +256,7 @@ class DataBook(object):
 		for dset in self._datasets:
 			collector.append(dict(
 				title = dset.title,
-				data = dset.dict
+				data = dset.dict()
 			))
 		return collector
 
@@ -267,12 +267,11 @@ class DataBook(object):
 		return len(self._datasets)
 
 
-	@property
-	def xls(self):
+	def xls(self, path=None):
 		"""Returns XLS representation of DataBook."""
 
-		stream = cStringIO.StringIO()
-		wb = xlwt.Workbook()
+
+		wb = xlwt.Workbook(encoding='utf8')
 
 		for i, dset in enumerate(self._datasets):
 			ws = wb.add_sheet(dset.title if dset.title else 'Sheet%s' % (i))
@@ -280,20 +279,25 @@ class DataBook(object):
 			#for row in self._package(dicts=False):
 			for i, row in enumerate(dset._package(dicts=False)):
 				for j, col in enumerate(row):
-					ws.write(i, j, str(col))
+					ws.write(i, j, col)
+
+
+
+		if path:
+			wb.save(path)
+			return True
+		else:
+			stream = cStringIO.StringIO()
+			wb.save(stream)
+			return stream.getvalue()
 
-		wb.save(stream)
-		return stream.getvalue()
 
-	
-	@property
 	def json(self):
 		"""Returns JSON representation of Databook."""
 
 		return json.dumps(self._package())
 
 
-	@property
 	def yaml(self):
 		"""Returns YAML representation of Databook."""
 
diff --git a/test_tablib.py b/test_tablib.py
index 959a01c..fc8cb7d 100755
--- a/test_tablib.py
+++ b/test_tablib.py
@@ -167,7 +167,7 @@ class TablibTestCase(unittest.TestCase):
 				csv += str(col) + ','
 			csv = csv.strip(',') + '\r\n'
 
-		self.assertEqual(csv, self.founders.csv)
+		self.assertEqual(csv, self.founders.csv())
 
 
 	def test_unicode_append(self):
@@ -176,10 +176,10 @@ class TablibTestCase(unittest.TestCase):
 		new_row = ('å', 'é')
 		data.append(new_row)
 
-		data.json
-		data.yaml
-		data.csv
-		data.xls
+		data.json()
+		data.yaml()
+		data.csv()
+		data.xls()
 
 	
 if __name__ == '__main__':