Well I got my NEX 3 today. This is the bigger of the two NEX camera's on the market, and I must say this thing is absurdly tiny. I've seen them in the store before, but I never knew exactly how tiny it was until I got it next to my DSLR and then started putting some of my DSLR lenses on it with the adapter I also picked up. I can't actually use it yet as the battery is charging.
Hard to imagine the NEX and the DSLR have identical sensor size. I haven't checked but I'm sure the NEX wins the image quality department since the DSLR is 4 years old. With a 50mm lens it's pretty reasonable. With the 11-18mm we have already entered the territory where the camera is now the accessory to the lens instead of the lens being the accessory. The 70-300 totally dwarfs it, but I will get AF since it is an SSM.