It sounds like del.icio.us-ing while pregnant, but it's really a new feature rolled out by Joshua Schachter and co. It works like this: if you come across a link you think one of your cohorts might like, you can send it to a special "sent by others" inbox by tagging it for:username. To check out what others have sent to you, go to del.icio.us/for/ which, via the magic of cookies, will take you to your "inbox from others" (assuming you're already logged in). Folks have been using ad hoc methods of doing this already, but this is an official implementation of the concept.

There's some concern about potential spam abuse of this feature (let's table the larger discussion of tag spam for a future post…). A couple of suggestions have been made in response:

• Give the user the ability to turn this feature off.

• Provide a "report spam" link next to each link in the "for" inbox — much the way Gmail handles this. If a particular user is reported as spam multiple times in a specified period, some sort of moratorium on their account could be enforced.

Admittedly, I'm never as concerned about spam as I should be (except when I'm griping about it happening on my own blogs — although installing a pseudo-captcha has stopped a good 98% of my blog spam). So, I'm up for trying the experiment. If anyone has something they think I might like to look at, feel free to tag it for:doctor_paradox — thanks!