(2013-06-21)
Just a note that in one case I had an Aironet 2602E-A-K plugged into a Catalyst 2948G-GE-TX via a 341-0212-01 Power Injector. The Gigabit interface on the AP refused to come up.
I had to force the port on the Catalyst to 100 Mb/s.
Once I did that, the AP brought up its Gb interface.