Depends on the requester. So it could be almost immediately, or all the way until auto-approval takes place. Most will be approved in about 3 days, the rest trickle in after that, I've seen some wait 30 days. Check out this thread in the scripts category, for a way to see when auto-approve will occur, while you are looking at a specific HIT.
Thank you for the information! I've already got one of mine approved, and made a nice 25 cents. No way I'll be able to get more than minimum wage through this site but it is a bit of a lifesaver considering I'm unemployed and have bills to pay.
Well if you can multitask well, you can use Mturk in between doing other stuff on the computer. I tend to make this program in between doing HITs.
I can multitask with some things, but Mturk HITS seem to require my full attention or they just take longer. That sounds like a really cool program!