As for Verizon's C Block win -- the block touted for its open access clause -- AT&T's convinced that the B Block made more sense for the very reason that it lacked those regulatory restrictions. The lack of FCC oversight is cause for some concern, yes, but AT&T continues to stress that it was "open" long before the whole C Block hullaballoo came along by virtue of the fact that any GSM device with the right bands can hop on its network.
In terms of timing, the company's not really in any hurry; it wants to continue to milk HSPA for everything it's worth, promising a 7.2Mbps downlink rollout through 2009, and realistically, we'll be well into the next decade before we see wide-scale use of 700MHz LTE around these parts. A little scary for the impatient among us, we've gotta say.