As one data point, I spent a while during college and took Turking seriously as a source of income and averaged about $7-$8 an hour over that time period. Not awesome, but not bad either for an always available, willing, form of employment.
"Always available" and and incredibly flexible form of employment. There aren't many jobs where you can sit down, make some money, when you need to take a break (kids screaming, etc), you can stop, resume again when you're ready. The flexibility is worth something.
aantix|12 years ago