Remember that Shiira v2 beta preview that delusions of grandeur had at the end of July? Well instead of simply reading about it, now you can take your own copy for a spin, as a public, localized beta has been released. Shiira, if you haven't been following the coverage as of late, is an open source and uniquely feature-packed browser based on WebKit, the same web (and also open source) rendering engine that powers Apple's own Safari.
Most of the new features that were previewed seem to be implemented, including the Shelf, Tab Exposé, a tab thumbnails option (instead of standard tabs found in Safari and Firefox), FullScreen Mode with a really slick and self-hiding navigation overlay, a palette replacement for the sidebar and more.
When this first landed on digg, the download was only a PowerPC build, but it has since been replaced with a true Universal version. So what are you waiting for? Get downloading!