What's your favorite internet fad? Check out Dipity.com. It's got all your favorite memes. Missed one? Add it yourself.
Yeah, I revisited Dancing Baby, Frog in a Blender, the Tourist Guy (ugh), The Flying Spaghetti Monster, Dog Skating... well, I got lost in the fun and had to run through the whole timeline.
But I quickly got hung up on You're The Man Now, Dog (YTMND) and demotivators, then 4chan and Anonymous. I got Serious, thinking about what an 'improved', more secure internet would do to the anarchy I love/hate. All that fun stuff got dropped and I posted The meming of security instead.
Happily, a comment on "the internets" snapped me out of it, and I was back with George Bush using "The Google" for aerial views of his ranch. The link I liked was tossed, but I still have one of my all-time favorites: Sen. Ted Stevens and his "Tubes":