OK, I'm going to p*ss off at least a few of you, perhaps more, with these comments. First, I'll say that I'm a big fan of the 338 win mag. That said, I think way too much time is spent on gadgets and equipment, and not nearly enough learning how to use it to proper effect, and getting in good shape and being able to HUNT. 339buckandbull's comment is exactly what I'm talking about (though I intend you no offense) when he refers to shooting at 800-1,000 yards. 99.9% of hunters have NO BUSINESS shooting at anywhere near these distances, and would be much better served to get in shape and be prepared to stalk closer rather than just take a long prayer type shot in the hope of filling a hard to obtain tag. If you learn to hunt well and are in good enough shape to do it, have the discipline to pass up shots you shouldn't be taking and make the ones you do take, you'll do just fine with either of these calibers.
I'm still a fan of the 338 over the '06 for elk, but there is NOTHING WRONG with the 30-06, nothing at all.