An AT&T-branded Palm Centro pretty much seems like a foregone conclusion at this point, but what about that other GSM carrier over there? Yep, the latest rumor has Palm's smallest, cheapest handset heading over to T-Mobile at some point, owing to some giggling (no, seriously) by Palm's CFO when asked about the prospects. The move would make some sense considering that Sprint and Palm are both pleased as punch with the Centro's brisk sales and the fact that Sprint's period of exclusivity is drawing to a close. Interestingly, it also sounds like any possibility of a Verizon Centro is in jeopardy following the 755p delay debacle. Drama!