Possible Solution Found
Hi all,
I have a MBA Rev B that I installed a Runcore 128Gb SSD into December 2010.
I, too, have been completely frustrated with the constant hangs and "beach ball of death" - on my MBA it can happen at anytime, regardless of whether I put it into sleep or not.
I've done all the usual, including disabling sms, changing the sleep state, unchecked the "turn hard disk off" in power saver etc. All to no avail.
However, I kept noticing that my MBA was constantly running hot and the fan was always at full speed (~80 degrees C, and 6200rpm). I then checked activity monitor and noticed that the indexing service, mds was using anywhere between 80-150% of CPU.
So, I disabled mds by typing
sudo mdutil -a -i off
Since then, no further hangs and computer now cooler and fan quieter!
Perhaps the hanging issue has with something to do with incompatiblity between the Runcore SSD and Spotlight indexing?
Anyway, it's now been about 4 days without issues, where before it used to hang about 3 times a day!
Just posting my experience in case it can be helpful to anyone else.
Cheers.