Google Chrome is a new web browser built on WebKit (the same HTML engine used by Apple Safari) designed from the ground up with web applications in mind. Security, speed, and stability in Google Chrome is paramount, with sandboxed tabs, the V8 JavaScript engine, and a multiprocessing architecture.

See the Wikpedia entry here: http://en.wikipedia.org/wiki/Google_Chrome

Prior to the press conference being held at 18:00 GMT (GMT converter) where the beta will be announced, Google has released a comic about Chrome. In my opinion this is a really interesting way to generate buzz about a product. http://books.google.com/books?id=8UsqHohwwVYC&printsec=frontcover

Paul Thurrott, noted Microsoft and Windows pundit, has an early preview and his take on Chrome. http://www.winsupersite.com/reviews/google_chrome_preview.asp