Not 24 hours after getting the n900 on the summit the rootfs partition was at 100%: there is no space left. All I did was installing fennec and some of the applications in extras-testing. I removed fennec but for example at the moment I only have 5 MB free memory in this partition and for me as normal power user there is no way to see why 45 of the 50 MB I had when started the device for the first time are already used now.

The usr/lib and user/share directory consume the most memory. But what files inside of these directories are needed and what files could better be placed somewhere else I don't know. I know the /opt directory is linked to a dir at the 2 GB partition on the memory card. Could I link other directories to a path in this partition too? If yes which exactly?

At the moment this point is the only one I don't like at the n900.