Well, the 40D will probably be my next purchase... if I can hang on that long!
My friend has just bought another 30D for an absolute song so he has a second body for Donnington this week, but he intends to sell it next week again so that is extreme temptation!!
If I survive that though I shall be in the market for the 40D. Speculation seems to suggest 10m/p, sensor cleaning and probably a couple more focus points. Basically bringing the next level up in line with the 400D with a couple of bells and whistles. Should be nice!