i'm sure all of you are familiar with wiggle and crc for buying bike stuff
I also use merlin a lot, they are especially good for components and wheels. They have a brilliant sale on at the moment. If you register you get a discount automatically and they have a further 12% off at checkout until 4th January
I'm all for supporting the LBS (and I do) but some of these prices are truly unbeatable
http://www.merlincycles.co.uk/