I just gave it (KaosGingerbread V3) a spin.
Placing calls works (digit dialing), inbound audio (during call) works, but no outbound audio (microphone) or speakerphone, so - no go as a basic phone right now.
Other apps which would normally produce audio (e.g. Music) are mute.
3G Data network is working.
The native browser crashes due to lack of google extensions, but Opera Mini 5 will work. (You need to install it as an .apk, because there is no Market).
Camera app comes up (doesn't crash immediately), but there's no image.
No WiFi for me.
Some apps work partially - ES File Manager sort of works (e.g. browse and install .apk's from the UI), Better Terminal, ATM (arronla), Opera Mini 5, AK Notepad. I even tried Vlingo - it didn't crash, but it fails to capture microphone input.
Note that I'm not complaining - just letting people know what to expect out of V3.
I overflashed the googleshits on a lark, to see what would happen, with very little expectation that good results would come out of it, and it just stays in a bootloop. (I suppose that there are profound dependencies on "framework.jar" by the Google apps, so I really wasn't expecting it to work - and it doesn't)
ATM reported 104 Mb (RAM) free - that's an encouraging sign.
I'm glad we still have active devs on the Eris - it's unlikely that the Eris will have the long legs that the G1 does, but it's pretty cool that folks are working on a Gingerbread release for the Eris.
eu1