You can't 'whore up' a small series with a cult-like following, not really. And releasing Persona for PSP is hardly a whore move, that game is prohibitively expensive if you want to go back and get it for PS1.
I should have been more clear. By "whoring it up," I didn't mean Persona, I meant it as a general phrase. I'm glad they remade Persona. In fact, I would love a remake of Soul Hackers or some other older titles. What I mean, as I stated, is that Atlus are churning out SMT games left and right, whereas before, they let them leak out slowly.
Perhaps you aren't familiar with the concept of consumer fatigue. Chocolate is great, but eating chocolate all the time ruins the experience.
Also, while a remake of a 13 year old game is fine, Persona 3 is already being remade for the PSP. (I think it's already out in Japan). Maybe that could fall under the "whoring" category, since the game is not very old and has already been released twice (original and FES).
As for Revelations: Persona being "prohibitively expensive," yes, it does sell for more than its original retail price, but I wouldn't consider $60 to $80 "prohibitive." People spend that much on a current-gen game all the time.