webmytop is a simple web-based MySQL monitor that uses PHP and jQuery to allow administrators to see queries running through MySQL.
Inspired by Jeremy Zawodny's mytop - http://jeremy.zawodny.com/mysql/mytop/
Funded by http://ferrago.ltd.uk
Disclaimer: Don't use this on the open web - you'll be sending your MySQL passwords out, and receiving confidential query details back. Use SSL or run it on a private network