I use Firefox, Opera, and Safari on a regular basis on three computers at home (Windows, Mac, and Linux) and two at work (Windows and Linux). That’s 11 sets of bookmarks that I’d like to pare down to 2.
del.icio.us helps somewhat, especially since I discovered I can add it as a search in both Firefox and Opera, but web apps have a certain amount of delay that doesn’t work for the most frequently-accessed sites. And I don’t want to add yet another web app, I want to sync the bookmarks in each browser.
Most of the solutions I’ve found (.Mac, Google Browser Sync, Opera 9.5, various Firefox extensions) are geared toward syncing two or more copies of the same browser on different computers. What I want is to bookmark a site in Firefox on one computer, and have it show up in Safari on another.
Update: I have since discovered XMarks, which does exactly what I need on Firefox, Internet Explorer, Chrome and Safari (but not Opera, though I use it a lot less these days).