Got my Rev B, 1.8ghz & 128SSD and here's my initial review. I had the original REV A with 1.6ghz and 80gb model. Although the I tried to justify the Rev A, I just felt it was too inadequate as a regular laptop. Its great for taking notes, and surfing the net. It would crawl when parallels is running or connected to a external monitor. The fans were always at 6200 and coolbook worked once and never did. Now, I just received my REV B yesterday and used it today when meeting a client. Same setup as the Rev B as I had used a time machine backup to restore my files. My observations so far. 1. Its definitely snappier. Probably because of the SSD and the processor. 2. The fans are much more stable at 2499rpms. Only time it got to 6200 was last night when I was surfing the net and had it propped up on a pillow thus blocking the vents. It settled down to 2500 much more quickly than the Rev A ever did. 3. Using parallels is no much more tolerable. No lags or slowness. I have not tried an external yet. So far, I'm pretty happy with this one. It seems very solid and a much more useable laptop without the compromises. One nice thing about the fan is the MBA is now quiet. I never noticed how noisy it is with the fan on all the time at full speed. Apple should have released this model as the first Rev.