Updated: April 8th, 2008
If you're serious about MySQL, it doesn't hurt to know the people closely tied to its development and maintenance as well as famous bloggers. Here's my ongoing list of people I consider important:
Peter Zaitsev – MySQL Performance Blog, former head of MySQL AB High Performance Group. His company Percona is available for consulting. He's a co-author of High Performance MySQL 2nd edition (great book).
Baron Schwartz – also know as Xaprb, Baron a co-author of High Performance MySQL 2nd edition and creator of innotop and Maatkit. Maatkit is simply brilliant, and so is Baron. Baron recently joined Peter Zaitsev at Percona.