compiling - Auto compile service on for Ubuntu packages?

Possible Duplicate:
What are PPAs and how do I use them?
create a .deb Package from scripts or binaries

Is there any service provided by Ubuntu , to automatically compile source to binary deb packages , and for multi-architecture ?

Yes, this is provided by Launchpad, called Personal Package Archives. This lets you built packages for any supported Ubuntu release, and for multiple architectures.