I find it interesting that I was just sent a news feed item on Facebook from the President:

Barack Obama is speaking at the White House forum on Health Reform. Watch live: http://www.healthreform.gov/video/room1.html.

The text below the news showed 3,875 users had clicked on the “like” option. I thought that was a strange number so I clicked on it as well and received a popup message: “unable to write to the database”.

It seems that 3,875 represents the maximum buffer on Facebook for likability. Not surprisingly a few minutes later the like option and like count were removed from the news item.