Penguinbait, do you think you could package up GParted for us? It really rocks for being able to graphically modify (resize, add, remove, format, etc) partitions on your SD card(s), a lot like Partition Magic. It would need a tweak; you would need to disable maemo's annoying habit of trying to auto-remount the first FAT partition of SD cards for the duration of the session. You would also have to include a bunch of necessary stuff like dosfstools and efs2progs. You may also need to run it with an explicit list of available drives, such as,

... this of course means that you wouldn't be able to partition a USB stick without dropping to the command line ... but maybe that's not a problem, I've only run it in a chroot, and that has issues with mounted devices...