We have already seen the feature list of the upcoming releases of BIS 3.1 and 3.2. I copied them below for reference:
v3.1 (June 2010)
- Two-way contact (address book) sync with Yahoo! and Windows Live Hotmail and Sync ML (ALT-N)
- Ability to share credentials on the device for an overall easier
- User able to self delete BIS account (added security)
v3.2 (October 2010)
- Calendar sync with Yahoo! and Google
- Small business management console
Piotr from BBNews.pl scored some screenshots of the BIS 3.1 on device management client. You can see in the screenshot that contact sync for Yahoo is in there and should also be there for Windows Live, Hotmail, & SyncML.
via PocketBerry – Thanks Tashanna!