I have been reliably informed that it may get a little warm over the next few months, which means my humble abode will turn into an oven. I need to figure out a cooling solution pronto.

I threw out the old fan this winter, and the quesition is should it be replaced by another fan or by something fancier?

Anyone have any fancy cooling solutions that are cheap, cheerful and effective?

Geek factor is always a bonus.