Thank you all! I finally got it working tonight. I had made several mistakes:
1.) The nfs-client had to be started with "sudo". It reports OK without sudo but it won't start... "./nfs-client status" said "nfs-client not running".
2.) My /etc/exports was indeed incorrect. I had tried a lot of different things here and left an invalid IP.
3.) I edited "hosts.allow" on my server to allow connections by "portmap" and "rpc.mountd" from any
machine on my network (don't know if this was really needed though).
4.) Kind of forgot the non-persistent nature of tc/mc - my mountpoint /mnt/nfs had vanished since i created it...
The strangest thing in all this is how my kubuntu destop machine would just mount my share without any errors...
Again many thanks! Yep! I'm a bit of a newbie but with your help I solved this. Now my network music player box is
one step closer to reality