One very helpful thing, by the way, when installing from a deb-on-the-web is to save it on the MMC in some directory (/media/mmc2/packages/), and install it from there; then leave it there. Now, should you want to reinstall, you don't have to hunt it down. And you can freely remove large packages to make space to try out something new if your root fs is getting near full; you can just reinstall from the SD later.