Is there any alternative to the Delicious feeds?

Delicious.com has a huge collection of tagged URLs, which it makes public, not least through these RSS/JSON feeds: http://www.de开发者_运维技巧licious.com/help/feeds

Unfortunately the news that Yahoo may discontinue delicious service continues to ping-pong. So my question:

If we do ever lose these feeds, are there any alternative services which offer similar metadata for URLs?

(For an example application of these feeds, you can try my Delicious Link Tooltip userscript or the grab the bookmarklet version from here.)

Since this question was posted, the Delicious service was bought by new owners, and it still has the compatible webservices and feeds (ref: Delicious API).

You could also check the Pinboard service which gained in popularity with the threat of Delicious shutting down. The Pinboard API is compatible with the Delicious API, so it's a pretty easy switch to support both.