It is not profitable for me to mine. But the heating helps a bit.
Same.
I earned approximately $4 yesterday mining with 2x290x and 4x280x with neoscrypt on westhash. Not nearly enough to pay the power costs. I have a 40mh/s scrypt asic as well that pulls about 1000w that is just barely profitable, but it keeps my upstairs warm.
I had three 6950's blowing on my shins all last winter. Mmmm.... 6950's!