Last December, Google launched a pilot program where it gave away lightweight notebooks running the first beta of Chrome OS, code-named the Cr-48. Reportedly, 60,000 of these units have been given for free to select developers, members of the technology industry press/media, and some who signed up to be considered by Google and were lucky to be gifted one.
This program ended in the spring, but in mid-June the first devices that run Chrome OS started to ship. There's considerable skepticism about whether Chrome OS will have much of an impact in the market, especially given the current hype for tablet computing over netbooks and thin-client notebooks with minimal hardware specs like the Cr-48. Chrome OS could also face identity confusion by the public with the Google's other OS platforms, most notably Android, but even Google TV (which itself is a variant of Android for TVs).
Here's a roundup of computing devices that run Chrome OS, a few which you can buy now, or which may be on the way.