Thanks, Tom. I'll have to look that one up.
I think the PrCs are a great idea too, Van. They really do add to the roleplaying experience. If you can focus on what it's like to be a particular PrC and not just its cool abilities, that ought to get the other players interested.
In my group's last campaign, I roleplayed towards the Contemplative PrC for my cleric. It did get me a prestige domain and extra abilities, true, but it also gave a new depth to her personality. At the final level of Contemplative, the cleric becomes an outsider. Forever different from family and friends.
Figuring out how all the physical and mental changes would affect her and how to roleplay that made things much more interesting than just levelling up in cleric.
Hope that gives you ideas on how to intrigue the others.