GTA IV: sold out, but more expected tomorrow
Seriously. We just went to GAME, GameStation, WHSmiths, Currys and three indies and none of them had any copies. GameStation had a few left on PS3, and that was it: no 360 versions to be had anywhere. Two of the indies told us they were expecting more in tomorrow.
We live in Worthing, for the record, an English town with a population of over 180,000. That'll teach us not to pre-order.