Ouch (http://www.gamesindustry.biz/content...php?aid=21561). Mind you, it's only Currys, PC World and Dixons who are saying this.
Incidentally, I've just phoned gamestation and they've been told that their next batch may well arrive the next day. So, if you've pre-ordered but are not getting it tomorrow it may turn up sooner than you think. Still can't find any accurate figures for how many units are shipping in the UK.