I have tried hard to replicate the problems others talk about concerning the D100. I have come to the conclusion that either there quality control is off or the problem is user oriented. Neither of these "problems" would necessarily be fixed in waiting longer.
If you have the money, and its 6 megapixel size are good enough for you, I would get the D100. To help your qualms about waiting I would say look at the history of computers and digital cameras. The number of transistors on a chip doubles every 18 months--Moore's Law. Yes, there will be a better camera before too long. However, that will always be true. The D100 has already received a version upgrade to its firmware. I would say that now is a good time.