Actually, she made several appearances on Alicia Silverstone's recent show MISS MATCH, did a TV-movie ("See Jane Date") and did a WB pilot (wasn't picked up, though.) I think she wanted to do PB because she just had a baby in March of last year and wanted to show off that she had worked hard to regain her figure. To her credit, she said she wasn't focused on much work right now because her husband and baby are her priorities.
Her character was interesting. We started out hating her but I've noticed how she has gradually become less shallow. It was really funny in season 3 when buffy was reading minds. Cordellia's thoughts had zero depth. What ever she thought was what she said. I read that they made fun of her character in Angel too.
I liked the way she stood up to the other mean girls in dating Xandor. The whole Xandor Willow thing was very stupid. Willow was cute and no male, especially one who thinks about sex all the time, is going to completely miss out on that about Willow until that moment he saw her in the black dress. Then he was all over her. Very stupid. They should have hooked up early and the lesbo thing should never have happened.