Hi Chippie,
Pinnacle is presently hiring. Their hiring minimums are 1000 tt and 200 ME. You can find more information at
www.nwairlink.com
You can also try Mesaba as they are gettting the next lot of CRJs from NW.
Other regionals that are hiring are Comair (heard the rumour that they have stopped since the announcement of chapter 11), Chattaqua, ASA, Express Jet, Midway, Mesa air, etc. etc.
You will be able to work for any one of those companies with your green card. Presently both NetJets and Flight Options are hiring as well.
Good luck with your conversions.