Price: Around $200 apparently - so probably under £200 - maybe even as low as £150, but a price should be announced soon and release is defiently this year presumably around the same time as the PS3.
Launch Games - Around 17 including Zelda and Mario
Mario - Mario is defiantly back with "Super Mario Galaxy" - also all the old Mario games will be download-able - similar to xbox live arcade.
Format - Standard DVD, as the console wont have any HD functionality- i think it will also have support for Gamecube Game.
Loads more info
here