HDRIBlog just posted a quick and dirty roundup of various makes and models of DSLR's and their AEB abilities (or lack-thereof in some cases).

They point out that Canon, for the most part, is lacking on the AEB features on many of cameras - from consumer to prosumer. Nikon's fine, as well as a bunch of the other manufacturers - which leads to the question: why in the world is this feature an afterthought? Seriously, it is a matter of a few lines of code. The camera already knows how to meter the light and can adjust in the intervals you want it to - why can't they just allow you to do that in AEB, to the degree that you want to? Eh? If the answer is simply to get you to buy the 'better' camera, then 'thanks, but no thanks.' Come on people, get with the program. Real Estate Photographers eat up AEB, and pushing people away from the Canon line-up (from the 50D all the way up to the 5D Mk II) is ridiculous, and I'm not even a Canon shooter.

One last thought - 3 isn't enough, but 9 is plenty. This isn't really a message to the manufacturers, but rather to the photographers. If you want to spend your whole day shooting and your entire night processing, be my guest. If they come out with 21 exposures, I would suggest skipping that one as your computer, no matter what one you have, is going to choke and your productivity will more than likely diminish. Exporting 20+ full-res TIFF files, combining them, then processing them will probably be your end. More than 3, less than 21 - that's the expression, right?

Check out the complete post here.