Working:
* Phone
* SMS
* WiFi
* Bluetooth
* Hardware video acceleration
* Video (youtube etc.)
* Headphone audio out (music)
Partially working:
* 3G is spotty and can be difficult to get running
* MMS is very finicky, not functional for many/most people
* Camera takes pics only, no preview window or video
* Some video intensive apps/games can freeze up sometimes
Not working:
* Built-in tethering (workaround: use third party apps)
* CPU does not enter "deep sleep" mode often and/or reliably