I have Bejeweled 2 on my iPhone, and I played the Classic and Action modes to death. All I play is Blitz now, which is seriously addicting, and I don't know what more they can offer with a 3rd game - it's still the same game.
However, I did play through Zuma's Story mode and had a blast. If there is a mode like that, it may be worth checking out.
While we're talking about PopCap, I have to mention one game - Plants vs. Zombies. Just wanted to say the name
