My informal results
Ok, I've had a little time to experiment with a few products. Here's what I'm finding works/doesn't work for me:
Assos: Expensive, and the best, but sometimes hard to find. Consistency great, doesn't break down, and it feels cooler on the skin, which puts it over the top.
Chamois Butt'r: More common, probably 70 percent the cost of Assos, feels just as good as Assos and second best by a slim margin.
Relief cream by Excel Sports: About half the cost of Assos, and it's available from their website. I didn't like the stuff. Kind of like eating Ben and Jerry's with all that thick ice creamy goodness, then suddenly getting a bowl of that five gallon for a dollar crap you buy at the supermarket and realizing they've whipped a roomfull of air into it in order to get it to fill the five gallow bucket. Relief mells okay, and works decently, but leaves you feeling like you should have spent the extra cash.
Udderly Smooth: Very inexpensive. You can get a big jar of it for something like 4 bucks at most drug stores. Really good for shorter rides, but it is more like a thick hand cream and because of it, gets absorbed by the skin over time. Smells okay.
Noxema: Very inexpensive, similar to Udderly Smooth, and found everywhere. Seems too thin to be of much use on anything longer than a short spin. It does feel nice and cool (kind of like the Assos), and doesn't smell too bad.
Bottom Butter: Find it in the baby aisle at the pharmacy/super, and probably half the cost of Assos. Very thick, and strong smell of cocoa butter. By itself, pretty good, but just too goey. And, a little goes a long way.
Destin: Similar to Bottom Butter, but very strong smell of Baby Powder, and very thick, pasty and you'll think you lost a fight with a tube of zinc oxide. GAAAAAAAAH!!!
If you just want to dab and go, my recomendations are to go with either the cycling specific products. Not too thick, not too thin, just right really. If you're rich, or think you are, buy the Assos.
If you like to tinker with stuff, do what I do and make your own mix. For epic rides, I'll bust out the jar of assos, but on everything else, a layer of Bottom Butter, followed by Udderly Smooth (or Noxema if I want its' extra antiseptic qualities) has been working great for me.
Cheers,
-Bob