Better brush up on your Japanese. GungHo is bringing six more Japanese PS1 games -- still in Japanese -- to the PSN, at $6 a pop. You may be able to get by with minimal language knowledge with some of them, but you might find some of the RPGs challenging if you don't know what's going on.
It's interesting to hear about Sarara’s Little Shop (Danjyon Shoutengai: Densetsu no Ken Hajimemashita), which is basically Recettear before Recettear. It's an RPG shop owner sim. And Tokyo 23-Ku Seifuku Wars is an RPG in a mixed up world where school uniforms have been banned. Lots of weird stuff on sale.
There's also: Dragon Beat Legend of Pinball, Heroine Dream 1-2, and NEO PLANET . Read more about them on the PlayStation Blog.