Recommendations for MSN IM for Palm Treo 750v?

Just got this in from one of my Treo wielding colleagues:

Just got my Treo 750 – very nice!!! any idea where I get an MSN IM client for it though? Very odd but it doesn’t come with it built in.

Any suggestions? Looks like Shape Services have IM+ service for both Palm OS and Windows Mobile — one of which should work on the new Treo?