A lot of people around here are planning to wait that long, read around - there are dozens of people on this forum planning to wait until October. So no, not crazy.
But of that percentage, how many people
need a new computer now?
To the OP, I'll say this: if you need a computer
now, then buy it
now, or wait until after Tuesday to see if there's a new machine released. Apple's release schedule (as well as the tech industry in general) is such that there's
always something better a few days/weeks/months away. If we all waited for the next top of the line, brand new shiny whatever from our favorite tech companies, we'd never buy anything. It's as simple as that.
Also, just because something faster comes out doesn't mean that your machine will run any slower. AutoCAD will run just as well on a 2.33 C2D MBP w/ 2GB Ram, the X1600, and traditional fluorescent lighting as it will on a SR-Based 2.4 C2D w/ 2GB RAM, the <insert whatever GPU> and LED backlighting.
If you want to/have got to have the freshest revision, then you
may be waiting until at least WWDC. And if you say you can wait 4 weeks, what happens if they
aren't released at WWDC. Then you've unnecessarily wasted 4 weeks that you could have been enjoying your new toy. If you're gonna buy a MBP because you need one now, then buy it now (Or Tuesday evening).