Social Bookmarking

[c0nt3nd3r]

I primarily use Firefox, but on occasion I use IE.

Backing up bookmarks in Firefox is done with Foxmarks, however in IE such an extension isn't available that backs up and keeps my bookmarks organized just how the way I have them showing in my Firefox toolbar, unless I export them and import them to IE.

I've been trying a few Social bookmarking programs such as Diigo, Del.ic.ious, Simpy just to name a few, but the problem is only Simpy and Diigo offers a sidebar to view and select bookmarks in a similar way to the Bookmark toolbar. Delicious does this in Firefox but not in IE as far as the sidebar.

Any suggestions as to which is better, integrates into both browsers?