Look around, you can get them VERY cheap (Score 1)

Narragansett Electric (part of National Grid) has been offering these through retail chains in Rhode Island and Massachusetts for a VERY low price, anywhere from $0.50 to $0.99 a bulb depending on the retailer. It may still seem expensive when you can buy a 4pack of regular light bulbs for $0.99, but when you consider they lost 4-5 times longer (8000-10000 hours vs 2000 hours) and use a quarter of the electricity, it really adds up. There are CFLs that are dimmable and 3way also that use less electricity, but they generally cost a lot more ($5.99 is the price I've been seeing) so I don't know if it's worth it at that price.