I've got one nasty problem.
i2c-dev.h is used by both linux-kernel-headers and i2c-tools packages.
I'd be really happy to have both gcc and usb host mode on my N900. Is there any way to rebuild headers (or i2c-tools) package, resolving this conflict? Maybe someone has already solved it?

P.S.: anyway, big thanks to MohammadAG for this, it really looks (and seems to be working) well, although it's beta.