vi works ok for me in both terminals, but it doesn't display quite correctly and scrolling right or left too fast crashes the terminal - I've no idea why this is... gpe-edit works fine however - I'll see about getting a more comprehensive text editor installed perhaps, but there's not anything I can do about vi/rxvt at the moment I don't think - The bug with the incorrect display happens in opie-console as well, I don't know what causes it.
As for the control panel, I don't think it's necessary - most of the gpe-conf sub-apps work fine, I think the control panel is just a hub for them - I'll ask the GPE people about this though, as well as about gpe-clock.
I'm not sure what causes the tray apps to act funny when covering parts of each other, certain orders of apps seem fine though - the default order should display ok... I think this might be a bug in matchbox, hopefully it'll disappear with time.
I've not tried gpe-multisync yet, I'll get around to it when more stuff works I'm working on getting gpe-nmf working at the moment, an audio-player I think is a pretty critical app. I'll update the feed later if I'm successful.