Hi Midnightskies,
It's definitely worth chasing this up. One of the advantages of computer based CBT is meant to be that it doesn't have such long waiting lists?
I know it's nervewracking but it's perfectly reasonable to ask your doctor how long they think it will be before you hear something.
If you don't want to ask in person you could send a letter/note to the surgery so the dr can check nothing got lost in the system.
Meanwhile you might want to have a look at this site - it's a cognitive therapy course on the internet - which introduces the main ideas:
http://moodgym.anu.edu.au/welcome
hope you find the CBT helpful - lots of people do.