I just installed the FC3 rpm from skype's website, and it works fine on FC5... but of course the sound problem still exists (the sound device remains busy when you hang up a call). But fortunately this is fixed by renaming the sound played on hangup:
Code:
# cd /usr/share/skype/sound/
# ls
busy4.wav call_in.wav call_out.wav hangup.wav im.wav
# mv hangup.wav hangup.wav-disabled