Mabe Stevie's involvement with Dave Stewart has something to do with it. Lindsey has stated that if and when Fleetwood records another album, he wanted to bring in an outside producer (which I think is a very good idea!).
We now know, from Dave's tweets, that he had Lindsey put his vocals on a song for Stevie's album. Perhaps Lindsey was impressed by Dave's producing skills, thus the impetus to go forward with a Fleetwood Mac album.
It seems now that Stevie and Lindsey really need inspiration from outside admirers to get the motivation to make things happen. Dave even hinted something about the Buckingham Nicks album. He's my favorite person right now!
