I'm listening to DPS 86, and they're debating buying current or waiting for the latest camera bodies.

I used to do this with my computer gear, but I've gotten over it by dropping back a year or 2 from the bleeding edge. Prices are better, and in the case of computers, Linux support is more complete once something's been on the market for a while.

Camera's make it even easier, because your just looking at the body -- it's only a fraction of the cost, and it can be eBay-ed later. I get to keep my investment in lenses no matter what body I have. That's why I was completely comfortable buying the D40 -- it gives me all the basic controls I need, and the rest is up to me.