I got gpredict running on my new Linux desktop box here tonight.  My daughter is utterly fascinated by this and got a kick out of watching the satellites fly by on the map.  I've promised to let her listen for the next AO-51 pass, which is something like 8:30 tomorrow morning.  We tried for FO-29 earlier, but didn't pick up anything.  From what I am reading, FO-29 only operates when it's in daylight, and on the last pass here it was in eclipse for most of the pass.