Anyone have experience with decent locking wheel nuts? Bike theft is RAMPANT here, and I like to do everything I can to try and cut down on the chances of my bike (or its parts) being ripped off. What's out there?

If you are running track ends on your bike, I don't think you are going to get enough clamping force to not pull a wheel. If you are leaving outside of DT/psu for hours at a time, just get a cable and loop it through the wheels, that will be enough to deter 99.99% of the bike thieves.

Yeah, I thought about that. I'd seen one that I thought looked decent, but with the type of fastener they use, and the "key", it looked like I wouldn't be able to get enough force on them. And yes, my bike does have track dropouts.

You could buy a set of the pit bull locking skewers amd put it on the front tire and then u lock through the rear wheel /frame. That would be the easiest way but might be a hassle finding parking sometimes since the bike racks get pretty crowded.

Krytonite has security wheel nuts and Pitlock does solid axle nuts (mainly designed for nice geared hubs and dynamos) plus they do locking for other components and you can get them with the same key (though keep in mind it doesn't lock the bike just the components)

I would also highly recommend a good high quality chain lock like one from OnGuard or Kryptonite or Blackburn (higher security is always better and lightweight locks equal lightweight protection) The stuff they rate for Motorsickles and similar equipment is more the stuff you want to look at. Dinky chains and dinky U-locks offer some protection and usually more than a cable but a serious chain is way better plus it might go through more stuff on the bike sometimes even frame and two wheels if long enough or at least frame and wheel and some wrapping.