regex question

[anton]

Hi,
I want to get a list of the files in a directory that do NOT end with 
".dat". I just can't work out how to do it - any suggestions?
Cheers
Anton
ps, i started with the idea of $ ls | grep \^d^a^t but it fails 
miserably :-(
-=-=-
... Cerebus:	I'd love to lick apricot brandy out of your navel.
Jaka:		Look, Cerebus-- Jaka has to tell you ... something
Cerebus:	If Cerebus had a navel, would you lick apricot brandy out of it?
Jaka:		Ugh!
Cerebus:	You don't like apricot brandy?
		-- Cerebus #6, "The Secret"