My Intel i7 has a 64bitnative architecture. 64bit is officially supported in Ubuntu and Wine packages. I have used 64bit for 4 years now, and alla the main compatibility bugs have been fixed more than 3 years ago. 64bit is more efficient than 32 while encoding videos or rendering graphics, and supports more C and C++ optimizations, which improves the overall system speed and reactivity. So I see no reason why I should use a 32bit OS. I won't argue with anyone on that point.
