The Atmos .NET library has been updated.  The new version is 1.4.1.16.  Changes include:

• Added Stream functionality: CreateObjectFromStream, CreateObjectFromStreamOnPath, UpdateObjectFromStream, ReadObjectStream
  
• Added configurable Proxy setting
  
• Bugfixes:
  
• Metadata values can now be null on create/update
  
• Issue #1 : Timeout and ReadWriteTimeout are now configurable
  
• Issue #2 : ListDirectory now properly handles WebException
  
• Issue #3 : Unicode ObjectPaths are now supported (requires Atmos 1.4+)
  
• Fixed ACL testcases
  

http://code.google.com/p/atmos-dotnet/downloads/list