Well, Opera doesn't seem to have convinced everybody, but it certainly convinced me to switch over again with version 10.51. Also in my personal test it was faster than Google Chrome beta and today's Chromium in the sunspider test (705 vs. 820 and 10xx ms). It works flawlessly with Google Mail, Blogger, etc. It consumes less memory than Chrome or Chromium, especially with many tabs open and uses less CPU when it's just idling. How I love the browser wars!
You can download the newest bleeding edge version of Opera from their Desktop Blog page.