Sadly no calendar (yet), but by using a program from WebIS and Plaxo you can now do an OTA sync of your contacts:

http://www.pocketinformant.com/produ...id=sync&dir=wm

And FWIW; I'm not going to use it because I hate Plaxo more than I can possibly explain. But I know some people here on FT use it, thanks for the occassional email Plaxo sends me asking if my info is correct