Forward your text messages to an email address with txtForward.

This is nice application and a useful one. txtForward lets you forward SMSs to an email address and is quite useful as a way of archiving text messages. I spotted this utility on Jason's Langridge weblog: http://blogs.msdn.com/jasonlan/archive/2008/11/24/txtforward.aspx
 
You can download the software from http://electricpocket.com/txtforward/