Couldn't bring myself to keep my G5. I think I had it about a month. I looked and looked and finally just bought the 10D and a 28-135 IS lens. Never without it. I have other primes and even one L lens but the zoom with IS is my version of a point and shoot rig. I just can't abide those itty bitty sensors on P&S digicams.
Until you are lugging a laptop with accessories, and briefcase complete with files, and a suitecase for 1.5 weeks of travel living out of a hotel... suddenly taking a 20D with my 28-135IS and I'm juggling just too many things... add to the fact that when I'm on business it's usually very long days and seldom time to get out and shoot.
Otherwise it's always my 20D with a full complement of lenses, etc.