sweet little command to dump your delicious bookmarks (copied/stolen from the Scrumptious setup guide):

    curl -u <user>[:<pass>] -o mine.xml https://api.del.icio.us/v1/posts/all

That's now running hourly on my computer. I'll write myself a "loss check" too, to see if any of my "questionable" (private) bookmarks start disappearing.