Yesterday, at Day 2 of Google I/O, it was officially announced that Chromebooks will be available in retail locations worldwide starting June 15th.  Perhaps even more exciting news was the mention that for Educational institutions (and businesses) these would be available at $20/month/user ($28/mo/user for business) which could be a huge savings (70% over traditional PCs according to the graphic here).

Here is the Keynote from Google I/O day two for those who missed it: