What else can solar panels power like this? How about a solar powered fan? It doesn't even need batteries. It comes on when you need it (when the sun is shining and heating things up). There's no guilt about wasting electricity, it can be on all the time.
So, I'm now the proud owner of a ~4 watt solar panel, and a small 12 volt "muffin" computer fan. And my bedroom, which used to get stinking hot in summer, now has a continuous light breeze.
When you think about it, still air is quite unnatural. Who knows what strange vapours are building up, not to mention dust? When you go outside, there's always a slight breeze. And a breeze just plain feels nice.