I'm not sure how big a problem the residential user not recycling CFLs would really be. Homeowners aren't curently required to recycle conventional fluorescent tubes, which contain a lot more mercury than CFLs do. Obviously, it would be good if homeowners properly recycled them, (and perhaps money-back offers similar to those used for old printer cartridges would help encourage it), but even assuming that every household CFL goes into a landfill, the amount of mercury released would still be much LESS than would have been released by powerplants to run equivalent incandescents over the lifespan of the CFLs. Any level of recycling by the consumer would make the situation even better.
COMMERCIAL users are required by law to recycle their used fluorescent lamps, and CFLs should be no exception.
