Delicious is a social bookmarks site where you can post and tag sites using Yahoo's servers.
- General Overview of backing up Delicious using the XML API. Up to date as of Sept 2008.
- When logged in: Settings -> Export - "creates a list of all your bookmarks in a format understandable by most browsers".
- XML Dump (requires username and password). Delicious doesn't like it if you try to call this more than once an hour or so. API details.
Most of the engineers are gone from delicious; one ex-engineer describes that it's on "life support". And it's run by Yahoo, which is pruning unprofitable services aggressively.