Originally Posted by marvfox
I have 2 gig of memory in the MBA 11inch with 64HD and never got any beach ball at all.
I gues I should have used "MAY" instead of "WILL".
A lot of that also depends on how much stuff you have running at the same time. RAM made a huge difference on my iMac, but it has a ton of stuff going on all the time as background tasks.
If you run your laptop more "lean and efficient", it would be less noticeable.
In any case, 2GB is enough, but more is better.