To get rid of the annoyances of busybox without removing it altogether.
For n900 at this time [PR1.3], become root, then:

apt-get install bash3
apt-get install coreutils-gnu
echo 'PATH=/usr/bin/gnu:$PATH' >>/root/.profile

If you're normal perhaps you only need the last line above

There are several other -gnu packages like findutils-gnu tar-gnu coreutils-gnu diffutils-gnu sed-gnu grep-gnu as well as mmv that would make your tablet much more gnuish ...