Nintendo is holding a press event for the Wii U this Thursday, in New York. Should reveal USA pricing and release date, what's included (eg will you need to fork out for a proprietary hard drive), and hopefully they'll give some more solid details of launch window titles.
Hopefully we'll get some idea of European price/release date then, too...
Still not really interested in the U, as it's closer to current gen than next gen (guesswork/opinion - don't bother arguing, Harv) but if it's less than about £180 I might take a punt on it. I still think it'll be more than that, though. Lots of speculation about it being $249.99 or $279.99 over the pond, which equates to about £155/£175, but we always get stiffed of course.