Anyone know anything about those Chromebook computers?

All depends on what you plan to use it for. They are great for browsing, watching movies, email, word processing, simple games, etc. They are cheap, they boot fast, they are relatively malware resistant and they tend to be pretty reliable, not getting upset every time something in their world changes.

Not much good for software development though and support for a lot of external devices is pretty limited. For example, trying to use one as a console for an embedded system is a bit of a lost cause due to lack of driver support for even a really common USB/serial converter.