If you can fit it into your bgudget a decent external firewire drive would help you a lot in general speed and response wise. Those small drives in the mini bottleneck a lot.
As for good quality H.264 rendering ... it takes a long time on just about any setup :/ I don't think there's really much else you could do aside from a faster drive that will really help you to tweak out that system for general video stuff.
As for good quality H.264 rendering ... it takes a long time on just about any setup :/ I don't think there's really much else you could do aside from a faster drive that will really help you to tweak out that system for general video stuff.