There are multiple servers running copies of each particular space (called instances). The reason for this is that at most 64 people can be in a single instance of a public space.
I wasn't in the same instance that Jersquall was in, and I still had a lot of fun being being an alien. The mixture where I was changed, as some of the androids were calling in reinforcements by recruiting people via the Central Plaza kiosk!
EDIT: Thanks Jersquall for the video capture.
Hey, Looks like I'm in there around 2:50. I'm not sure about outher people but I know I had a great time last night Body Proping with Mr. and Mrs. Lochwood, Skaing to stop the Alien Scum from entering the the listening@home booth and even forming a line to trap the Aliens over by the Saucer Pop game.
I was pretty busy doing the multitask thing and didn't get to talk to everybody there but I did see you and the Lochwoods and alot of people I didn't even know. Even made a few new friends.