(edit 05:04) Frodo Author Christian Bauer appears to have been working on an internal SDL GUI, which would avoid the problems with TK gui (creating a seperate window not registered with hildon), but no changes apparent since 2005
Looking at CVS now it appears the Frodo authors have a zaurus and that the sdl gui is in current development. It appears that a port with builtin gui features will be available fairly soon.
I have built a cvs version that runs now, but the fullscreen and arrow keys / dpad arrows do not work yet, so there is no user benefit over the previous release.