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Let's see how long this lasts. Every time a Twitter update goes through that is the least bit opinionated, I lose a "friend" or two. ;-) I was up at 800 a few weeks ago, but then there was a big clawback. Also, some people quit Facebook (and later come back), leading to fluctuations in both directions (it's why your friend count can go up suddenly even though you didn't add or authorize a new friend).
Facebook: It's the MMORPG of the century. ;-)
(Also, 800 is really nothing to scream about. I see nowadays that the kiddies are routinely befriending their entire high school classes. Imagine being up over 1,000 friends before you even hit college. I've seen it.)