According to this he's leaving MTW.
Television - News - Frankie Boyle leaves 'Mock The Week' - Digital Spy
Friday, October 2 2009, 10:54 BST
Frankie Boyle has left Mock The Week to concentrate on other TV commitments, while the show has been signed up for two new series by BBC Two.
Dara O'Briain will return as host of the satirical news quiz, with its panel members drawn from the world of comedy.
Angst Productions series producer Dan Patterson said: "Frankie has been a brilliant member of the team since the beginning and the door is always open for him to come back. We wish him all the best with his other projects."
BBC Two controller Janice Hadlow said: "Mock The Week is a major part of the BBC Two schedule, regularly delivering wit and energy to an enthusiastic audience.
"This two series commitment shows just how much we value it."