My only option is to try a secondary desktop environment, like the LXDE-in-Xephyr hack I used in the current Easy Debian. But because the screen is so small on the N900, I have to find a way to make everything in the secondary environment big and "chunky". I also need to figure out a way to get out of the secondary environment and back to Maemo, something that is proving to be quite challenging now that there is no hardware keys for toggling fullscreen mode or pulling up the task switcher.