MacInTouch Home Page: "The Omni Group released OmniWeb 5.0, a major update to its Mac OS X web browser. The new version includes tabs, workspaces (saved collections of windows), saved browsing sessions, site-specific preferences, RSS newsreading, enhanced bookmark management (with filtered views and history), keyword shortcuts, ad blocking, bookmark synchronization using WebDAV servers, page marking (for quick returns), HTML source editing, spell checking, and more. OmniWeb is $29.95 for Mac OS X 10.2 and up."
There are some neat features on this list, especially for users who don't want to, or can't, upgrade to Tiger. Once Tiger comes out both OmniWeb and Firefox will become more competitive with Safari -- since Safari upgrades will be tied to Tiger.