Dave was speaking to Howard Stern on the Late Show last week. In the interview Dave asked him about his contract renewal but Stern flipped the question round asking Dave how much longer he’ll be doing the Late Show for. Dave replied “Maybe two years, I think… I think that’s what it is”. Stern said he has to beat Jay Leno before he goes.
It’s widely reported that Letterman’s contract to host the Late Show runs through to August 2012, but may be extended.