Right now, from what I've been seeing/hearing on the regional level (Eagle & Colgan) is that people are getting picked up with around (average) 1200-1500TT and 200-500ME. I'd say right now competetive/preferred is around 1500TT and 200ME with recency of experience and 121/135 experience and no/limited checkride failures.
I think Eagle has picked up quite a few CFIs and 135 pilots with some 121 experienced pilots in there. They don't want any high-time guys, they want folks that are fresh to the 121 world. Colgan is all over the place, but they won't pick up any high-time guys either that are a threat of leaving soon.
jetblue and AirTran, my guess is those spots will mostly be filled with furloughed/laid-off pilots from USAirways, Midwest, ASTAR, Aloha, etc. and maybe a few current RJ pilots.
Personally, I wouldn't spend any money on CRJ courses, pay-to-play programs, buying block time, etc., because I think it'll be quite some time before all the current furloughed pilots will find a new home or will be recalled. My recommendation is to keep flying and instructing and making CONTACTS/NETWORKING!