Ah. I found out how to link to a specific item in a slashdot journal (briefly: scroll down to the bottom, click on "List all Journal entries" in tiny print, and then on the appropriate title).

And why did I want to do this? Charlie Stross's birthday rant on social neoteny. It's a wonderful concept, and can be used to explain so much that is otherwise strange about working in a rapidly-changing field. And probably why my social life has returned to the level it was at when I was in academia back in the late '80s / early '90s...