Lifehacker shows you how to back up del.icio.us bookmarks on your blog. As the article points out, aside from backups, there are other benefits to doing this:
bq. It also kills two birds with one stone: participate in the del.icio.us community AND update your blog daily with one del.icio.us post.
This is a “no-hassle” solution done completely through your del.icio.us account. I tried this initially on this blog, but later switched to yadd for a more flexible solution. I made some minor modifications to meet my needs, including a change to the post title, and the automatic creation of tag hyperlinks.