The problem with lazy roommates is that they are so used to doing jack shit and living in filth, nothing works for leverage against them. My roommate is a bit of a slob, (and I thought females were supposed to be clean, I'm seriously reevaluating my gender preconceptions) but thankfully she mostly keeps the Hurricane Katrina Aftermath in her own room. I'm anal and like things clean/organized, so I basically maintain the rest of the house by myself.
I came to the realization a long time ago that it's harder to get people to do shit then it is to just do it yourself. It's a sad reality, but it's better then pounding a brick wall and seeing 0 results.
PowderHound and TreeNinja