Nike sent a "launch calendar" for the season out to all their dealers and the Uptempos and 180's are on there with a specific release date of 7/7. Most of the confusion probably stems from Nike implementing a release date for in-line releases which they don't typically do (or at least didn't...
the original colors that were released last year were in the regular inline catalog for this spring/summer, but Nike ended up canceling the production. They will not be rereleasing those colors this season after all from what i can tell.