While testing my new iPhone 4 (ios 4.1) i see the following:

1. tasks/notes are not syncing 2 ways. (coming in future release afaik)
2. Contacts are syncing only 1 way, from device > groupwise
If i add a contact, i see it on the contactlist in groupwise. If i add a contact in
groupwise i don't see him on the iphone. Is that true?

So summarized i can only support mail and calendar items at the moment to my iPhone users.

Can someone confirm that.