Any Of You Folks Sell Any Stock Images?

If so, what sites are you selling them on and why?

Do you find places like Corbis / Comstock etc work better for you than the micro-stock sites such as iStock?

Also, have you found any stock sites that issue payouts quicker than 1 month for any images that you sell?

We're about to start a massive stock photography production drive in the next few days and im doing some last minute research in addition to all that i have already done so any help you can offer would be appreciated :)

Regards,

Lee