There’s a ton of bookmark managers out there, but this new Tidy Favorites service is an interesting example which offers some neat features. It’s thumbnail based, which is not necessarily a good thing (read slow) but the interface lets you group bookmarks in folders, highlight the exact portion of the site you want to see and you can keep temporary links in the sidebar instead of cluttering up the main screen.

I’m somewhat ambivalent about these bookmarking services, because I can’t really see how much more value they add than something simple like Netvibes.com, but this is certainly worth a look.