Marcia Wallace passed away Friday. Her's isn't a name most people would recognize, but her voice is. She played the voice of Edna Krabappel (Bart's teacher), the crazy cat lady, and other voices on The Simpsons. I also remember seeing her on The Bob Newhart Show (different from the show Newhart) as a kid. They plan to retire the character just like they did to Troy McClure after Phil Hartman died.
Depending on who you talk to, Marcia either died from complications due to pneumonia or complications due to returning breast cancer. Supposedly she was able to tell the show's producers that she had health issues. I'm hoping they gave her a chance to say goodbye.