Cheers guys, I figured it out earlier today (currently using free night internet on my phone so couldn't reply sooner...
Prof, all I can really say about your machine is that your running as the first user who is probably an admin user, as is Nick and KW...
Nick, each column means the follwing:
Most of them should make sense (UID User ID for UNIX, PID Process ID, PPID Parent Process ID, TTY terminal the process is running in, CMD is the command), not sure what C, STIME and TIMe are, though I would guess the times are something to do with how long the process has been running and how much CPU time it's had.
I was previously using the internet sharing from my Mac to give the server an IP address. I set up an old router I had as a DHCP server for the network and now all my problems have gone! NFS is working nicely and SSH is nice and quick to prompt me for my password!
I\ll ring up Apple to see what they have to say, if nothing else they might revert behaviour back to how it was in Leopard, though I can't see it causing many people much of a problem...
Many thanks to you all
