I won't be using it myself...at least not until they have completely cleared up the privacy issues (which they now seem to have made a start on) and added certain basics like a Bookmarks manager and RSS feed capability. I'm sure these will come; this is just an early Beta.
I'm still a little concerned about Google's attitude to private data. For instance, caching your entire browsing history going back years. I'm not talking about the Windows cache, or the Firefox/IE cache wich can easily be wiped; I'm talking about this....every search you've ever made; every page you've ever visited.
I think Chrome is more than just another browser. This is Google's first stab at an online OS. I'm sure over the next few years we are going to see all manner of applications, from an online Office suite (Google Docs) to maybe even SU itself running in Chrome. This is aimed right between Microsoft's eyes.