I recently have seen many webs talking about qt-creator, the new IDE that has been made by trolltech. My question is if anyone knows where can I get the source code of this IDE? The binary package doesn't work because of diferent libs versions of qt...

Nowhere at the moment. The source will be published some time in the future, possibly when the final version is released.

You can get the code here (Qt creator is a GPL software): http://labs.trolltech.com/gitweb?p=qt-creator;a=summary