It depends on what you want to do long-term. If you want to do clinical work, then, no, you're not going to find something that most people would keep long-term. If you want to do market research type stuff, you're probably more likely to find something because there's more cash in that field.
I've heard terrible things about working for Reading Corps, FYI. I was in AmeriCorps and that was great, though, and I've heard excellent things about VISTA. Although, I suppose those two depend largely on what one would be doing, specifically.