John Gruber is having some Atom linkblog troubles over at Daring Fireball.
Mark Pilgrim’s “How to make a linkblog in Atom” is a little dated (some of it is specific to Atom 0.3), but the part about using rel="alternate" to point to the permalink (on your blog) and using rel="related" to point to the item you’re linking (on another site) is still valid. It’s up to the feed reader to present that to the reader in an appropriate manner.
Here’s how NetNewsWire handles rel="related" in Daring Fireball’s Atom feed:
One benefit of doing it this way (besides following the Atom spec) is that it allows John to post multiple rel="related" links per entry. Another is that it would be consistent (clicking the title of the entry would always take you to DF). And lastly, it would also allow John to drop the (now redundant) hyperlinked “hash” (#) at the end of the entry.