Still remains a mystery to me to hear people with 4-5 hours of battery life with MB Air. I wonder if you are really putting a clock on it or if it is just your perception. To make sure I was being accurate myself, I clocked it this a.m. and again this p.m. Machine was on running Word and VMware Fusion with Internet explorer running on that (have to use for compatibility with my office). I was primarily doing work via explorer. Was using it heavily for the entire hour.
Fully charged battery overnight and read 100%. 1 hour of work and battery had only 60% of life remaining. As I type this, I have had 30% battery d/c in 45 minutes with the same activity.
Assuming consistent battery discharge, that extrapolates to 2.5 hours. Pretty poor if you ask me and totally discordant with the 5 hour reports.
Wouldn't VMware + Windows in addition to Leopard drain the battery more than just using Leopard by itself?