Okay, I have had a couple more days to use both machines, I still finding myself using the 11" model much more than the 13.3". I have also found that the 16:9 aspect ratio of the 11" actually makes it not that much smaller when playing widescreen formatted movies which use the HD or widescreen ratio. The 13.3" model is a 16:10 aspect ratio, so it letterboxes when you play HD or Widescreen aspect ratio format movies. The 11" is a wider display with less vertical resolution, but the widescreen or HD movie aspect ratio fits the display better.
I have run iChat video chatting several times on both machines, and I have found that iChat video chat eats up battery life VERY fast. The battery will only last about 2:45 on the 11" and 3:45 on the 13.3" when running iChat video chatting over WiFi. The machines both heat up after about 20 minutes of video conferencing and the fan kicks in at an audible level. The rear of the machine on both laptops heats up and is very warm, but not scorching.
As to reply to what people are saying about the size and weight. The 11" model is CONSIDERABLY smaller, it is nearly 60% of the size of the 13.3" model and the weight factor is considerable when you try to carry them around. I am not saying that the 13.3" model is a heavyweight, of course not when you compare it to a MacBook Pro or any other "full-size" laptop. I am just saying that the 13.3" MBA FOOTPRINT (size it takes up) and bulkiness of size compared to the 11" makes it "feel" like a full-sized laptop machine (I am not counting thinness here, just footprint) compared to the 11" which feels like a tiny netbook. The 11" is such a great machine. It is a marvel of engineering. The 13.3" model does not feel much different than my old Rev C 13.3" (yes, I have a rev C also, but I am selling that model on eBay right now, bid is at $885). The new 13.3" and the rev C 13.3" feel pretty much identical in size and weight, and footprint. They are almost identical machines, the only difference in them is the amount of flash storage, the video card, the extra USB port, the SD card slot, and the 1440x900 resolution of the new model, and the lack of backlit keyboard on the new model. Everything else about them is pretty much identical. A bit of resign to a more square backside, a new screen hinge, and the ports right on the machine instead of in a flip-down port slot on the older rev C model.
Here are some photos comparing the new 13.3" MBA (2010) to the Rev. C model (2009):
(2010 on left, rev. C on right)
(same shot from the side)
(2010 on top, Rev C below)
(2010 top, rev. C below)
(2010 top, rev. C below)
(Front thickness, 2010 top, rev. C below)
(2010 top ports, rev. C ports with door open below)
(Bottom of units, Rev. C on left, 2010 on right side)
(top of units, side-by-side, 2010 on left, Rev. C on right)
And....
Here is another pic of the 13.3" 2010 and the 11" side-by side so you can just see the huge size difference in two, based on footprint. This proves my point again. The 11" is CONSIDERABLY much smaller and much less footprint than the 13", which seems mammoth in comparison:
