diff -urN pyExcelerator-0.6.3a.orig/pyExcelerator/CompoundDoc.py pyExcelerator-0.6.3a/pyExcelerator/CompoundDoc.py
--- pyExcelerator-0.6.3a.orig/pyExcelerator/CompoundDoc.py	2005-10-26 11:44:00 +0400
+++ pyExcelerator-0.6.3a/pyExcelerator/CompoundDoc.py	2006-11-01 11:24:37 +0300
@@ -538,6 +538,7 @@
                                         
 
     def save(self, filename, stream):
+        from sys import stdout
         # 1. Align stream on 0x1000 boundary (and therefore on sector boundary)
         padding = '\x00' * (0x1000 - (len(stream) % 0x1000))
         self.book_stream_len = len(stream) + len(padding)
@@ -545,8 +546,12 @@
         self.__build_directory()
         self.__build_sat()
         self.__build_header()
-        
-        f = file(filename, 'wb')
+
+        if filename == '-':
+            f = stdout
+        else:
+            f = file(filename, 'wb')
+            
         f.write(self.header)
         f.write(self.packed_MSAT_1st)
         f.write(stream)