I don't believe any AIM versions have been updated to support WM5. There are a few other applications that provide some connectivity, but all in all, the IM experience on the 700w is very disappointing. Here are my comments for testing with IM+ -
http://www.everythingtreo.com/forum/...ce-5685-2.html
Hope this helps...keep us posted if you find a solution that works reliably!