Entirely apart from how amazing the concept of Web Services is, and how it's allowed me to suck info off of Amazon's servers for the music I'm listening to, I love XML because it's the backbone of RSS, and I just found out today that Craigslist has RSS feeds!
They're at the end of every category page. So I can now keep tabs on all the new furniture in Manhattan. Or internet engineering jobs in Queens. Or casual encounters in all of New York. Cause those shits are funny.