I was surfing mindlessly through the 'Net tonight and quite accidentally ran across a link to my old fraternity. I followed it to the main headquarters page and found they had a member locator section, and I proceeded to spend the next hour typing in names of old friends I haven't seen in twenty years or more. I then did some lazy man's detective work and found e-addresses for several of them and shot out some emails to see how the were doing.
I honestly don't get nostalgic very often, but tonight it's hit like '05 hurricane.