I'm going out on a limb here, but they should be in your download list and tied to your login ID so you don't have to pay again. This is speculation of course. A good way to test this is to re-download a game that you have payed for and see what happens.....
Should be.... the list is in the online store, not your HD.
I am betting it checks your machine ID, as well as your PSN ID. Otherwise you could log in on your friend's PS3 and free games.So if i had 2 machines i would only need to pay once for the games?
So if i had 2 machines i would only need to pay once for the games?