You might try looking for an older machine that's cheap to tide you over.
I'm not quite in the same situation -- I've used OS X for over 5 years, so I'm not looking to switch for the first time. I remember back before I got my first OS X Mac, I used to read all the sites like this about the first public versions of it, and wanting it badly. So I can certainly sympathize.
Recently my wife and I decided that we needed a second laptop since there's too much contention for the one Macbook we have.

Especially when I need it for more serious work and she can't use it to surf.

I figured we would wait for Santa Rosa Macbooks and Leopard, sometime this summer. Kinda started getting in that mode of checking for every tidbit of information regarding possible dates for those...
Then last weekend I decided to see if our 4.5 year old G3 iBook could possibly be fixed with a do-it-yourself method. It had suffered the infamous logic board problem and was no longer eligible for repair. It sat, "dead" for about a year. Long story short, I was able to fix it, and I've been using it a lot this week. It's almost like having a "new" machine again, even though it's older, slower, and runs Panther. Actually it's still quite good for basic web development and surfing.
So now I'm out of the waiting game, at least as long as this iBook lasts in its second life. Kind of a relief not to worry about that anymore. New stuff will come when it comes, and when there's a good enough jump, maybe we'll upgrade. No more rush.
Maybe having an older machine would put you in the same mindset for the time being.