Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
Opera releases are always worth a look. It's the testing ground for new features - and a preview of what Mozilla's Firefox and Chrome will implement in about three years' time.
Here's a quick hands-on with the Mac version.
Before you even run the alpha, the engineering quality is evident. While the Firefox 4.0 beta weighs in at 64.2MB, the Opera 11 alpha tips the scales at 34.4MB. Opera contains far more browser functionality as well as having an excellent email client built-in.
Regular users may notice a couple of tweaks. The Personal Bar is now called the Bookmarks Bar, but I noticed that it's populated with the default Bookmarks, even after you've moved them to the Trash. (This is an Alpha, remember).