According to a post in Opera Labs, Opera will have full hardware accelerated browser available soon. Unlike Internet Explorer 9's hardware acceleration--which is limited to Windows 7 and Vista, or Firefox 4's, which is fully available on Windows 7 and Vista but limited on Windows XP, Mac, and Linux--the way that Opera has built its hardware acceleration allows it to be used in full on any computer with the hardware to support it. This means that not only will Opera's hardware acceleration support Windows XP, Vista, Windows 7, Mac OS X, and Linux, but that Web-enabled televisions and devices such as smartphones will also be able to use it. Opera says that any device that uses the OpenGL ES 2 standard will work with it.
Opera 11.5 (alpha) is available for download, well, unlike Opera's promise, it's only Windows only.
UserAgent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:220.127.116.11) Gecko/20110218 AlexaToolbar/alxf-2.0 Firefox/3.6.14