I just ordered a MBA, but if the rumors get anymore solid about an upgrade in mid Oct I may utilize my buyers remorse period over the next 2 weeks and send it back, btw, can you send it back within the 14 days even if you open and use it?
Even if it is upgraded apparently it won't increase in speed much, only in HD space and maybe battery power. I'm using MBA as secondary mobile laptop so don't really need lots of space, but extended battery life would be good. So I may end up just keeping it anyway even if there is an upgrade.