I hate standard lycra bike shorts. Too darn tight, bulky, and expensive. I found a cheap solution.
I got a pair of Danskin bike shorts for about $10 at WalMart. Then I bought two nice chamois from AeroTech. Those folks are very nice and accommodating and agreed to sell me just the chamois.
I discovered that you can ride comfortably with the chamois without even sewing it into your shorts. No, it doesn't really move around, honest. Most importantly, it's very easy to wash! This is what I'll do if I go on tour. Just keep washing the chamois, not the shorts.
I know this sounds really bizarre, but I tested it on an all-day ride and it worked just fine.