I have Arch with — suddenly — KDE4. The 4.6 has, however, started to feel the lack of resources.
Problems with lack of space (I have 4G) solve the following:
1) when you update the system directory with the package cache of pacman stand on your SD card
2) part of the "fat" pulling for a bunch of dependencies (namely OpenOffice.org) keep the portable version and run from the SD card. Rather, the complaints I stopped not even on the portable version, and build from Infra, which is unpacked on the SD card.