The Greek Font Society has released a new font called Neohellenic. They released improved versions of existing fonts too (available here).
They seem to have fixed the problem with font names, that I pointed to on my last comment (Fontforge complains about font name mismatch, but Mac font names seem to be written using ASCII).
On the new release, I think Neohellenic is an interesting font, but it also has an issue. And I doubt whether it is a bug or a feature. The italic and bold italic faces don’t have the “a” glyph, they use “α” instead. And if this was not accidental, I don’t think is wise for the rest of us (whose mother language is not Greek).