I got the following from a "reliable source."
Look for the following:
8120: March 1st-ish. UMA compatible; Titanium and Blue-Purple (maybe the blue when the Suncom merger is complete.)
8820: April. UMA compatible.
It's possible that AT&T may release earlier than TMo, like maybe Mid-February.
The 8110 will not be released on TMo, at least not in the forseeable future (these things have been known to change.) It will probably come out for ATT but no date as of yet.
Also coming this spring-summer (hopefully by 3rd quarter,) BIS 2.5 supporting HTML email (on 4.3 devices) and wireless upgrades for specific applications, like Browser, etc. (not the entire OS.)
So, 4.3 will likely be out by then across the 8000 series device line to support the BIS 2.5 that's coming.