Thanks for this plugin, it's quite nice to see some improvements to qtranslate.
The creator of qtranslate just sent a request for help via the latest change on his plugin, and you look like doing a good job with mqtranslate.
Perhaps you may start working together? Especially to implement performance improvements suggested by other contributors because as nice as this plugin is, it's still slowing down wordpress as you may know!
Thanks for your answer
(sorry for the repost - I'm posting this here and on your website, as I don't know which one you monitor)