Cannot find TweetSharp v2.0
http://tweetsharp.com/ is expired
http://tweetsharp.codeplex.com/ - 404
http://code.google.com/p/tweetsharp/ - 403
https://github.com/danielcrenna/tweetsharp/ - seems out of date, for example does not have TweetSharp.Twitter.dll
This is quite strange. May be some light on this?