A ways back, before there were a lot of web forums for every conceivable thing under the sun, I used to do play-by-email RPGs with my friends, using an online mailing list service... luckily, we were playing TFOS, which doesn't need too much in the way of dice.
I've done some in-person pen-and-paper stuff as well, mainly Rifts and Palladium. Probably the most unusual one was when me and a couple of friends played through a Heroes Unlimited campaign while literally hiking along a ten-mile trail through the woods - it did make the hike seem to go really fast, though :)
Also, I think I still have some pogs lurking around somewhere...