FWIW:

2007 we planted 22% more corn than normal, and for the first time in about 50 years our farm dabbled in HRWW on 40 acres.

In 2008 we are going back to a more 50/50 split with corn/soys, and have a great stand of HRWW on 115 acres right now (should be interesting).  We still have thoughts about some spring wheat, but another 75 cents would might take some more acres out of our 50/50 corn soy split.

We custom harvest around a 1000 acres.  One guy is going back to 100% corn for the third year, and the other is staying on his normal 50-50 split.

Good luck