I've been switching out normal incandescents for these for a while now. Costco sells both 60 and 100 watt equivalents. The difference in heat is very noticeable, this was the main reason I started switching over to them. They do sell them in floodlight style bulbs as well.

Do not put them on dimmer circuits, even if you leave the dimmer on full blast all the time. If the dimmer kicks in, the bulb's regulator circuits will blow. They do take a while to get to full brightness, so as Don said, quick on/off lights aren't ideal. This might also affect the bulb's lifespan, but I'm not sure of that.

Hopefully they can figure out a way to get them to work with dimmers. I have interior flood-type fixtures on dimmers, these are the main lighting source in the family room. They would be really helpful to keep the heat down in that room.