ABI / API changes since T2 2.1:
 - GCC-3.4 -> GCC 4.0
 - GLibC 2.3 -> 2.4-CVS with NPTL instead of linuxthreads by default
 - monolithic X11R6 -> modular X11R7

Renames since T2 2.1:
 - network/ipw2100 -> firmware/ipw2100-fw
 - network/ipw2200 -> firmware/ipw2200-fw