Evil Player Characters - What to do with 'em?

An earlier game journal post or two detailed the ordeal of Agnal, an evil cleric who was outed by NPCs to his fellow PCs. Agnal was interrogated, bound, and carried by horse and under guard some distance from where he was discovered, left weaponless and with little hope of returning to the center of game play.

I'd never been challenged before by a player who had chosen an evil alignment for a PC in a party of neutrals and lawfuls, and though I'm slightly haunted by the feeling that I might have railroaded his fate, in the end it feels justified as he was just too much of a sore thumb sticking out for the others not to notice.

Since then, nearly all of the original party has died. Agnal still lives, and I'd left open the possibility that he might return to play at some point in the future. New characters have been rolled up, and (perhaps because of Agnal still living and my offer being known) alignment choice for the new characters have been either evil or neutral. We're now looking at the possibility of a new party composed of evils and neutrals, possibly led, but at least accompanied by the elder creep Agnal.

While the traditional dungeon certainly still holds allure for PCs of this persuasion, I'm curious what others have done in similar situations. What types of adventures have your party's evil characters engaged in... did you write up scenarios with their evil alignment specifically in mind? Are there even published materials which you've used (perhaps with modification) for this? I'm just looking for a little extra inspiration here.

I fondly remember the time (as a young teenager) my beloved Winkle Ellapote (6th level CE Elven thief) ravaged the Village of Hommlett with my friend's 9th level Assassin and a host of hirelings. It was all wrong, but a lot of fun. Now that I'm on the other side of the table, my mind is racing with options and to be honest, I'm a little nervous about where these new, evil characters may venture!