you need one of these babies (http://www.vornado.com/support/new/howheater.htm). The air coming out of it doesn't seem too warm, but it'll keep a good-sized room comfortable. It's got a thermostat, and if it tips over (forward, backward, or even to the side), it'll shut off.

Saved my shiverin' butt when my heating unit went out a few weeks ago.