AOL Mail now has a RIA application built in Silverlight 2. From what I have seen so far, it is pretty snazzy. Signing up for email there is free, and you can even reactivate your old AOL screen name for free. Check it out at: http://ria.webmail.aol.com
FYI: The above screen shot is from the Mac OS, showing off Silverlight’s true platform independence.
Hat Tip: April Russo