The Thin-Client Challenge?

An Anonymous Coward asks: "A friend of mine showed me this webpage which basically asks this question and offers a challenge to create a UNIX-ish Thin Client that can connect to a Windows terminal server. He really is serious, and has attempted this on his own before. Any hope out there in the Linux world for a small, easy to deploy thin-client only distro?" This is not the first time this question has come thru the pipe before, however I figure if someone can answer this challenge, all will benefit. Does anyone think this can be done? If so, speak up, if not, please give reasons as to why.