(no subject)

[jennythereader]

I was reading through some of the information pages over at LibraryThing, and I came across a wonderful phrase: "The Seven Wonders of the Web." It got me thinking, what are the 7 coolest, most impressive, most significant websites out there.

I came up with four, and then blanked.
1. Wikipedia
2. LiveJournal
3. LibraryThing
4. Del.icio.us

What sites would you add to the list?