I like the band too, but getting the RadioHead arduino library going and watching data go across RF. That's exciting.
It's funny though. I wired up two arduinos, got them talking to each other over a stupid cheap little 433Mhz, then declared victory and put them back in a box before I figured out why exactly I wanted them to do it.
But wheels are spinning. Now RF is easy and available and sitting in my project box. Fun!