I'm not sure about postings but its pretty easy to start yourself. Just buy a website template from a number of places that offer them and start advertising for whatever you want to do on websites, trade shows, and such.
I have recently been talking to some real estate agents who are friends of mine and they are all interested in paying me to photograph their houses for sale. I am waiting for an appeal on a denied work visa from Singapore and if I am denied again I will start doing that during the days and try to expand my business. I currently work 1830-0730 3x a week so it would be ideal.
Its by no means professional but I believe there is potential. There is a lot of photography work out there, I think you just have to start from the bottom, be willing to work for cheap at first, and expand once you have proven yourself.
"Give us a kiss, big tits."