Sorry for being scarce. Busy times. eHalcyon, I did get your message. I will soon put up a winners compilation thread. Also, you are correct that there is no more room for Victory cards in the set.
For those of you who are interested, here is the Secret History of Magic Lamp:
I thought it up and submitted it to the contest. The end.
But seriously, gaining Action cards "in hand" is something that can quickly get crazy as a Kingdom card, but could work fine for a Prize. Golden opportunity. Magic Lamp is the simplest version of the concept, so there it is. Robz, I agree that being able to gain $5 cards would be way more exciting. I definitely considered it before submitting, but I thought it would be way too strong compared to Bag of Gold. Yeah, Bag of Gold is weak for a Prize, but compare the two for a moment. I would argue that "Gain an Action card costing up to $5" is in general more powerful than "Gain a Gold". Furthermore, Bag of Gold only puts the gained card on your deck, whereas Magic Lamp effectively puts it into your hand. That's a huge boost. I think I said this stuff earlier, but yeah. That's my rationale.
If down the road playtesting shows that Magic Lamp is weak, I'd be willing to give it +1 Card or +1 Action or both. However, I think there is plenty of excitement in doing stuff with $4 cards, e.g. Band of Misfits. In fact, Magic Lamp is basically a Band of Misfits that lets you keep the copied card. Sometimes you don't want to gain that card (e.g. Death Cart), but usually you do. So I'm happy with it as is until such time as it proves to be weak and/or uninteresting.