Yeah, I used Flubit for my copy (using Zavvi as the price to get it for about £28). Mine arrived via Currys/PC World on Tuesday, though the delivery date was supposed to be last Friday. Perhaps the Bank Holiday backlog is stuffing up Royal Mail?
I don't think so, because I also got the PS3 version of Final Fantasy XIV through flubit, and they delivered that on Wednesday, the day after it's release.