I'm no Apple rep, so I obviously don't know for sure, but I have a strange feeling that the delay on the recent stock they just received was due to small fixes on the initial stock of MBPs. Keep in mind though (search for posts by me if you want to read it), that chances are these problems only occurred in less than 1% of all Apple MBPs that shipped. For every one problem you have here, I have no doubt that there's probably 100 other MBPs that went out that had no issues. Keep in mind that they have already sold tens of thousands of these things, and there's (in comparison to the number of items shipped) only a handful of problems here. There's posts here about offices, for example, receiving 32 of these things, each one without problem.
I know it's not the same thing, but in college we were taught about the life of software, and it's evolution. Each Release Candidate (RC) comes w/ a number of bugs, through which each successive RC tries to fix. However, each new RC comes w/ a slew of new bugs. Now I would imagine that hardware QC (Quality Checking) is much more thorough and intensive as you can't just release a patch for hardware that will redo some sodering, add a capacitor, etc., and therefore there will be fewer things to fix, and most of the "issues" are going to be tempermental things that only exist in a handful of items. I used Klipsch ProMedia speakers as an analogy for this, and even though they're obviously not the same company, I like to equate the two in terms of the quality they produce. Both Apple and Klipsch are at the high-end of what they do.
Companies like Apple release new generations of items not to address issues, but rather to refresh their product line and maintain a level of sales. Now with their new generations, I'm sure they attempt to address the supposed issues, but that's not their primary concern (take the iPod for example... they're on their 5th generation. I'm sure each generation has had its known issues, but there's PLENTY of people who have 1G iPods that are still running strong).
Anyway my point is, there's no reason, IMO, to wait for the next generation of MBP, unless you're hoping for a hardware improvement, bundled Leopard, or fixes. Chances are the issues others are experience won't affect you, and there's nothing saying that the next generation of the MBPs won't come w/ a new "issue" that needs to be addressed.