iPod Games - anyone think existing downloads will work?

My kids have 3g Nano's, when they got those i had downloads of games from my Video that didn't work. iTunes Store had me repurchase them and then refunded me the $$.

So i was wondering if the versions we were running now would run on the new ones... they are all putting them on their Christmas list (and 1 might get one because her & I lost hers last month at the doctors office).

So if/when someone gets a new version and can try this - i'd appreciate knowing!

Thanks!!