Simon Willison has a great piece here about disambiguating URLs. Best practice on creating and publishing URLs is obviously something of interest to any publisher. See this excerpt from Simon's post:

"Here's a random example, plucked from today's del.icio.us popular. convinceme.net is a new online debating site (tag clouds, gradient fills, rounded corners). It's listed in del.icio.us a total of four times!

Combined that's 433 saves; much more impressive, and more likely to end up at the top of a social sharing sites."