At MySQL Conference & Expo 2009, I will be giving a presentation on Q4M tomorrow (Apr. 22) from 11:55am. If you are interested in using a simple, fast message queue as part of your system, please come to the session. Details: Using Q4M: A Message Queue Storage Engine for MySQL On the next day (Apr. 23), I will be doing another presentation at Percona Performance Conference, held at the same locati