Hi,
Just to let you all know, due to the ongoing multiarch work, it is not possible to cross-compile relatively complex packages in ubuntu. For example, following the instructions[1], Firefox. While building on oneiric, patched packages from the linaro-maintainers overlay are needed, many of those patches are on precise, and rest should get there during the next cycle.
Cheers, Riku
[1] https://wiki.linaro.org/Platform/DevPlatform/CrossCompile/FirefoxCrossCompil...