A few years back, Mr. P and I added on to the house and redid the kitchen. One of the things I insisted on when changing the kitchen was to add a second, FULL-SIZED SINK. We both cook and we collide at the sink.
Luckily for me, not only did Mr. P add the second sink, he tied it into a different gray-water drainpipe. Big deal, you say. You darn betcha, since in a fit of refrigerator-cleaning enthusiasm I managed to clog the living daylights out of the sink we use most often.
It took over 48 hours and two sizes of drain augers for me to clear out the pipe (Mr. P being out of town when desperately needed, darn it)and I am here to tell you that the second sink, not tied into the clogged line, was wonderful.
If you're thinking of redoing your kitchen (and what Chowhound isn't?), do consider a second full-sized sink.