After reading all the rave reviews, I went and ordered a 64GB RunCore SSD from MyDigitalDiscount.com.
Got here in three days.
Instructions suck, but I already knew how to fieldstrip and open a MacBook Air, Version 1.1 , 1.6Mhz, 80G 4200RMP drive {having done so to reapply ArticSilver grease [ solved all the overheating problems totally ]
Time to complete, about 30 min, most of which was trying to get the rubber gasket around the drive to seat properly in the MBA frame that holds it. The cables they give you are too fat for the transfer and the little case, I'm not counting the time to back up the MBA onto the drive with the included transfer clone program, but eventually it all went back together and the moment of truth arrived....
... WOW.
That is all I can say, WOW WOW.
Using Xbench 1.3 the Disktest went from 23.36 to 106.7 for a 345% increase!
It even increased the overall machine rating from 46.95 to 73.67 for a 57% increase!
I have a version A iMac Aluminum 2.4Ghz and in side by side comparisons, the dogs like Microsoft Word and Excel open about 1/3rd FASTER in the MacBook than the desktop, before it was at LEAST twice as long on the MBA.
I am totally satisfied, and I've been building computers for myself and friends, including upgrading Apples wherever possible for many years.
RECOMMENDED, it like a new machine, no, better, cause I didn't have to PAY FOR A NEW MACHINE!