I hate this criticism because it's so abstracted from real world use. The vast majority of people will ONLY use those cameras for FaceTime because the iPad is just too unwieldy.
My 13" MacBook Pro takes crappy still pictures too, but you don't hear me saying, "you know, I really wish it took better pictures just in case I happen to want to take a picture while it's in my lap. I mean, wouldn't it be great to not have to pick up my camera or phone if I'm already using my MBP?"
At some point (and I think it's true of the iPad) this just becomes silly.
You really can't compare a laptop and a tablet. Form factors are totally different. But even if you could, I'm not saying the iPad 2 camera shouldn't be inferior to numerous other options, only that it not be ATROCIOUS on its own, not even really in comparison to anything else.
The video, even for just FaceTime, is not very good either. Optimal lighting, it's okay.
But I guess I should repeat myself yet again, would the cameras stop me from buying an iPad? No. They did however seal my decision to skip upgrading this cycle. Which is probably only wise, anyway, since the performance improvements won't affect my iPad use for at least another year -- i.e., it was only a WANT nowhere near a NEED, or even a WOULD BENEFIT FROM. The other thing I liked was the SmartCover, which also turned out to be not so smart. It looks cool, and I like the idea that it actually functionally integrates with the operation of the iPad, but practically speaking Apple's case for the original iPad is a better case/cover option while still not adding much overall weight or thickness to the device.
People (not you, but other people) seem to take any criticism of their purchase like I'm calling them fools for buying it. I'm not. People can tell me my original iPad is thicker and slower than iPad 2, and has no camera or SmartCover options at all, even if there are issues with those features. That's entirely true. But I'm okay with that. I don't feel like people are calling me a fool for not upgrading.