I guess this is as good of a place as any:
From the Coachella Board:
"from a source:
radiohead will be releasing tour dates within the next couple of days. i can only speak to the fact that they will be playing dc metropolitan area (that's where my source comes from), but it is assumed that they have other gigs lined up as well in other cities. supposedly tickets (at least for dc) will be onsale on the 14th of february"
Take it for what you will...