I checked out the Diamond Cut website and see that there is a retailer in my area that supposedly carries them so I'll check it out. I'm not all that hopefull though - they look like they have the same type of pockets as most jeans.
I've worn some other pants that have a crotch gusset and it is definitely comfortable. Arborwear is a good example. They're very great pants, made in the USA, and they never seem to wear out.
I'll have to experiment but I have a feeling that with some pants I may have to go with rear pocket carry.