Opera 12 Alpha can be downloaded from their site over here.
The main benefits being touted include:
- Faster graphics with hardware acceleration
- New HTML5 engine
- Faster browsing with reduced memory usage
- New themes
- New address field
- WebGL support for games 3D content
It's a good release for an alpha and it feels smooth and speedy. I still find that some pages look a little odd sometimes in Opera, and it's something that has happened over the past five or six releases and I have never worked out why. That might just be me, but I don't think it is. It's also a bit of a memory snatcher as well, but this is quite typical of an early release. It's worth a try anyway.