I would be very wary of AT&T from the get go, no matter what 'pronouncements' they make 'in passing'.
The recent debacle over the 'iPhone' is instructive; the big question from the beginning (and now painfully obvious to all who ran out and actually bought into it) is that AT&T's wireless network (you know, the one they sold to Bell South/Cingular just 2 years ago, then bought back a few months ago!) is by far the slowest, clunky, data throughput of any carrier in the U.S., being hampered by GSM EDGE 'technology'. Apple said upon launch the 'reason' they went with AT&T was 'coverage', yet apparently that didn't include the western U.S. (where Apple itself is located!), because the coverage west of the rockies is indeed, rocky at best, with both Sprint and Verizon (both running a large percentage of their networks on CDMA 2000 varients at 5-10 times faster than EDGE). But I digress; AT&T is being sued over the 'warrentless wiretapping' rollover, and like virtually all the telcos (except Qwest) have multi-year prison sentences for the CEO's to look forward to as soon as the dictator Bush and friends get kicked out of 'offfice'.
But, I guess that maybe that's why the servers are offering SSL, but the big attention is still the P2P crowd.