I guess Spaces has died out in popularity with all the new features in OS X. I only recently realized how great virtual desktops are; here's mine!
Space 1 is my browsing/media/social space, where I IM, use iTunes, and browse with Firefox. In Space 2 I have my productivity space, currently running Dreamweaver, Photoshop, Cyberduck, Pages, and Firefox (I usually use Chrome here) for my website. Space 3 houses Thunderbird for email, and Space 4 is Crashplan sending away my data to a safe place on their servers.