Profile IDs: 10, 11, and 13 respectively (IDs 8, 9 and 12 do not exist)
How they knew about Facebook: While Putnam, Laverdet and Cuervo have early Facebook IDs, they weren't extremely early users of the site. Some engineers who worked at Facebook saw some early IDs were open and snagged them for themselves. That's what happened here.
The three got jobs at Facebook by hacking and pranking the social network. These hacks caught the attention of co-founder Dustin Moskovitz, who contacted Putnam. When Putnam moved to Silicon Valley, Moskovitz offered him an interview at Facebook. Laverdet and Cuervo were later hired too.
What they're doing now: They've all left Facebook. Cuervo is currently head of design at Dropbox.