CricKet has been expanding, too. And promoting themselves with very-much-discounted phones.
They've expanded coverage to Charleston in South Carolina, Raleigh, Durham, Chapel Hill and Burlington (if I remember correctly the "Research Triangle" where Nextel's ultra-fast Flash OFDM network was tested awhile back) in North Carolina and Rochester in New Yourk. Yay unlimited cometition!
Note that I say competition because the regional GSM carrier SunCom also has an unlimited plan, albeit at a more expensive rate and with more pervasive, two-state coverage.
Phone-wise, looks like there's a $50 mail-in rebate on every single phone CricKet has online right now, pretty much everywhere they have service! Making the KRZR $300, the Razr v3c $210, the SLVR $130, the Kyocera K323 $80 (!), the Motorola w315 $60, the UTStarCom 7025 $30 and the Kyocera K132 $20 (!!!). Cheap phone with rebate, anyone? Geesh.