I'd like to share a way to get the Belkin wireless USB stick working (model F5D8053) using linux drivers, since I only found solutions using ndiswrapper on this forum. This solution was taken from http://ubuntuforums.org/showthread.php?t=919044&page=3 .
download the rt2870 pkgbuild
yaourt -G rt2870
download the sources
edit rt2870.h -> in the device list, add the device as listed in lsusb - for me it was
Bus 001 Device 002: ID 050d:815c Belkin Components
build and install the module
load the module