Atm the only choice we got is between Mesa which ships with Ubuntu (it's outdated before release) or one from Oibag PPA which is latest git development branch (very unstable).
What about latest stable Mesa? There are huge changes in drivers for AMD with each Mesa release, so I wondering how can I get it (atm latest stable is 10.3-RCx) without compiling everything myself (which would propably result in broken system)?