I’ve used this to add a LinkRoll page to the side bar.
Fred Wilson posted about Delicious Link Roll ( pre public but then he has a reason to keep a closer eye on them ), with a interesting idea : using a tag “Link roll” to limit what shows up.
Also, if only Delicious had better tagging operatation you could feed it a list of tag and do a “show bookmarks related to this topic” sort of thing.
Nov 15th Update
Del.icio.us has completly revamped their help page, and exposed a new feature : Tag Rolls, a way for you to display your del.icio.us tags as part of your website. I’ve placed a tag Cloud of my top del.icio.us tags over on the Link page.