Rune - you can find the blog post here http://blogs.windows.com/skydrive/b/skydrive/archive/2012/09/10/attachments-me-connecting-skydrive-with-gmail-and-tips-for-other-skydrive-developers.aspx
Jeff - you can find the demo code here http://sdrv.ms/VMnPpY
You can find the latest documentation on the api's here http://msdn.microsoft.com/en-us/library/live/hh550844.aspx
@Lori - i will clean up the code and put it up in a different location. Are you looking for a particular sample? Maybe i could send that to you earlier.
@daveoggy - Here is a more detailed example http://varunpuranik.wordpress.com/2010/11/05/t4-code-generator-extensibility/
@EzaBlade - have you made the change in the Web.Config?
@PilotBob: Have you marked the member with the DataMember attribute?
I have not had a chance to blog about this but those interested in the source code and find the demo project here.
@dentedduck - There is no need to update the client, code gen will take care of it for you.
@Weqster - You can assign attributes when using Windows Authentication, you will need to however hook up the roles provider.
@Ben - Look at the samples posted here
http://blogs.msdn.com/b/silverlightws/archive/2010/03/17/two-samples-from-today-s-mix-2010-talk.aspx . The Video chat example is based on SL4.
There is update support for both JSON and SOAP endpoint today.
You can find the source code here :-