The US PS Vita store currently has nine PSOne titles available for download, a number that has left many PS Vita owners unhappy. Their anger might be understandable if you consider the European PS Vita store has over 100 PS1 titles. Plus, the PS Vita's latest firmware update, 1.8, adds the ability to transfer your PS1 library from the PS3, to the PS Vita, which is great! But it does make American gamers wonder: Why only 9 games?
Sony has heard the cries of their fans and made a statement. You can read it after the break but if you want the "tl;dr" version, it sounds like Sony has to go through a few extra channels to get approval for titles in America. Perhaps more permission from third-party publishers is needed here, than in Europe.