I've created a brainstorm for solving the rootfs problem properly. You can find the forum thread for it here:

http://talk.maemo.org/showthread.php?t=43833

The brainstorm itself is here:

https://maemo.org/community/brainsto...n_in_the_n900/

Vote for it, and we might get 2GB or more free in rootfs instead of just 90MB :-)