I use deli.cio.us to post the occasional (okay, infrequent) link, but I regularly follow info-viz Jedi Tom Carden of Stamen Design on my network. Check out this note he posted:

Deli.cio.us is social, but the level of interaction one achieves by following other’s links is so limited, it’s practically anthropology. That’s why I found Carden’s gesture of communication to his lurkers (like myself) positively shocking in context.

We’re still getting the hang of things like Twitter, so this example fits into our contemplative mode of late: What other ways can we challenge the conventions of these services?