But once you started the download, it's in your list of purchased games. You can download it again at any time for free as long as it's available on the PSN. If you look in your history, or the game list, the game will have the little red shopping bag icon on it, showing you've purchased it.
But the question is...will it download past that stupid 9999KB? If not, then I might just buy the disk...anyone know how much it is right now? (Amazon.com is blocked here in the network I'm using).
Infamous 2 is as good as the first from what I have played. I beat just the first one and I'm about 2 hours into the second.