To keep up to date on certain topics I really like to use the Delicous popular pages. For example git, python or database. All these pages also have a feed which I have been subscribed to for a long time now.
Unfortunately those feeds all have a common problem: they often show the same links more than once. I’m not the first one to be disturbed by this, there used to be a service called del.icio.us filtered to tackle the problem - but that service is offline since July 2007.
So I created my own small script. Just point your feed reader to http://mobdel.patrice.ch/unique.php?feed=popular/*tag*&uid=uid where tag is any Delicious tag and uid is any identifier you want to use.
For example you can use this git feed: http://mobdel.patrice.ch/unique.php?feed=popular/git&uid=someuser.
Whenever you update this page you’ll only see links that you haven’t seen yet (with the given uid).
Go on and subscribe - just make sure you don’t use the same ID as other people when you subscribe…
Update 2008-08-08: I’ve added some rules to normalize the URLs to make sure that as few duplicates as possible go through. I’ll incrementally improve those rules to make sure it helps with decreasing information overflow.