Well I live in downtown Las Vegas, about 2 blocks (maybe 1400 feet) from the geographic center of the entire area so I can pick up nearly every single casino comm system as long as they're broadcasting with enough RF power. A lot of them, especially the ones using trunked systems, limit the power they're radiating so I can't hear Jack from 'em - one example is the Excalibur which is about 4.7 miles point-to-point from where I'm sitting right now. I can't hear diddly from 'em at this location, but if I get within about 1 mile of the casino I can pick 'em up again.
All the downtown stuff here is within 1/2 mile of me and easily monitored and can be pretty fun sometimes. Also, I can pick up the Fremont Street Experience security and know what drunk fell where during the evening lightshows, or when a pickpocket is popped. Interesting, to say the least...
But yeah, I've been wanting an earpiece for a long time, and when I get some cash on hand I'll be ordering one from Dynamic Designs off the link I posted above. The price is simply amazing... I have no issue paying good money for a quality product, but $100+ for an earpiece from Motorola? Get real...