Siliconera points out, other Konami titles like Castlevania Chronicles have been rated in the past but have yet seen a release. It could be a long time (or never) before we see this classic on anything other than a PS1 disc.
Hopefully this does come into fruition. It was quite disappointing that the PSP pack Suikoden I + II didn't see release outside Japan. So, if the game does come out on the PSN, North American PSP gamers will finally be able to take Suikoden on the go.