Ok, after a bit of a struggle I have my 6950 up and running.
Used grinders mod procedure to unlock the xtra shaders. Worked great thank you

I tried to follow the
steps detailed here but using the ppa drivers just didn't work. aticonfig/catalyst couldn't detect the card and I couldn't move on. I tried the stock ubuntu fglrx modules as well and nothing would work on a clean 10.10 install
I then followed
these steps to install the drivers direct from amd, and after a reboot the card was detected properly.
I then jumped back to the first link again, but substituted stream 2.3 for 2.1. I couldnt get 2.1 to work with poclbm. Diablo
said here not to use the ati download drivers, and that I would need stream 2.3... so I dont know what the right answer is really.
pyopencl compiled nicely, and I've been running polcbm connected to slush's pool all afternoon.. ended up with a small room heater next to my feet now

~310000khash/s
-w of 64 128 and 256 don't make any noticeable change
-v jumped it from ~260000khashs/s to ~310000khashs/s
-f2 is what Im using as the PC is a spare server and not needed for a gui.
Im going to start bumping the clock speed as per
this thread here and will report back.
Anyone else running 6950's with input? Im not sure if I'm using the correct driver versions (stream 2.3 & catalyst 11.2) but I guess if its stable and generating enough hashs's then its probably ok.. What are other 6950's getting?
Im new to the pool mining too, Im seeing this, but no coins yet... all normal?
racerx@fry:~/Downloads/poclbm$ ./poclbm.py -u xxx --pass=xxx -o mining.bitcoin.cz -p8332 -f2 -w256 -v -d0
16/02/2011 16:25:52, b7402f1a, accepted
16/02/2011 16:25:56, 38b477ca, accepted
16/02/2011 16:26:03, d518754b, accepted
16/02/2011 16:26:15, bee6b69d, invalid or stale
16/02/2011 16:26:22, 4df8f54a, accepted
16/02/2011 16:26:32, dc3e84ae, accepted
309385 khash/s