I requested my first cheque from www.istockphoto.com. It's going to be a whopping $600 US. I'm getting pretty excited for it. They say that it will take about 10 days for it to get here.
My next goal is to make enough money to request another cheque before the previous one arrives.
Payment is available via paypal, but I don't have an account and it doesn't seem entirely clear how you get your money from them once someone has put money in your paypal account. You would think they would put that in their FAQ.