Customized Arduino board manufactures.

I need to have a customized Arduino board(Mega) for one of my project. anyone know about cost effective reliable manufacture (for prototypes and less quantities) ?

Someone like me to design it, and iteadstudio to make them.
$9.90 for 50x50mm, ten boards.
$24.90 for 100mmx100mm, ten boards.
Other sizes, price will vary.

Some examples:
http://www.crossroadsfencing.com/BobuinoRev17/
I've done 2560 designs done also but not posted pictures. I have a customized footprint with slightly thinner pads that will pass manufacturability checks for solder mask application.

I use cbas-usa.com in CA to assemble them, am not good myself at placing parts with very small pin pitches on the pads for reflow soldering.