The April meeting of the Columbia PHP Meetup will feature Eli White, Digg's PHP guru:

For our April PHP meetup, Eli White of Digg will be giving an insider's tour of Digg, including what they're up to and how they're using PHP. We've got a great meeting space at OmniTI and will be providing plenty of pizza and soda for everyone.

I really enjoyed our last meeting, and I'm looking forward to Eli's talk. I hope to see you there!