No I don't use any chain lube. If you ever get any chain lube on your hands it feels more like glue than lube. Everything sticks to it, making a real mess of things. And it is a bugger to get off once it gets a bit of dirt and grime sticking to it.
When I wash the bike I use a mild degreaser like Simple Green on the chain and rinse (not high pressure) it off, then I wipe it dry and spray the chain with WD40. Wipe the excess off with a rag and you're ready to go. The WD40 repels water and cleans the muck off. It'll look clean and shinny. The chain stays surprisingly clean and is much easier to keep clean. My thought is a clean chain will last longer. I have herd people say that the WD40 isn't good for the rubber o-rings, but I have never had a problem. And it seems a few others here agree.
Usually the night before a race/ride I will spray the chain again and wipe off. Till the next day most of the carrier in the WD40 has evaporated, leaving a pretty dry chain that has a thin coating of protection. It doesn't attract mud and dirt, and doesn't make a mess on the wheels, sprockets and whatever. I do this very often, pretty much every ride on my dirt bikes. Street bikes require much less love.