Hopefully with the new version of Firefox, they will make it easier than ever to keep your bookmarks safe. Problem with delicious is, I'm really a fan of organizing bookmarks by folders. Tags are great because you can easily add them to a bookmark, and you don't have to worry about having multiple tags per a single bookmark. Yet, I still enjoy the folder system of bookmarks. Ob, do you use the regular bookmarks menu in Firefox? Do you back them up? The main reason I'm using delicious, is because I had lost over 600 bookmarks in the past, and I was extremely upset with that, and upset that I didn't back them up. So, don't make that mistake if you happen to have a few special bookmarks for yourself. There might just be that one site that you can't ever find again. I know the feeling because there are probably a few hundred I have yet to visit after 2 years of my bookmarks being lost, and most of them I really wish i could remember. Hopefully Firefox 3 does help with the backing up of bookmarks though.