Another good Google Checkout deal through Moviesandgamesonline.com
This is the best price I can find for the PS2 Guitar Hero 2 bundle pack. I know it has been this price before elsewhere (eg HMV) - but I think this is the best around at the moment.
Go through Google Checkout to get your £10 off - bring the price to £34.99
It says dispatched in 24-48 hours on the site.