On the 77A flights I took, it didn't show the altitude/speed/tail wind or head win, which used to be on the old system. Also, the daily news channel never work! Or was that just me?
on the first 77A flight i took (on kpb in Aug 2008), there was no altitude, speed, tail wind, etc etc.
however on recent flights (dec, jan, april 2009), there was altitude and speed but no tail/head wind.
i remember trying out the news on the first flight and it didn't work as well. don't know about now...