Dave Gilmour on "Midweek" - UK Radio 4
Dave confirmed that he and Nick and Rick were currently "jamming in the studio" and "preparing [to start] the new album". He didn't mention a release date. Concerning the break-up with Roger, he defined the point of no return as during the filming of "The Wall", basically saying that Roger's ego had got too much to handle. Also, apparently, at one point (he didn't say when) he was advised by the police not to go to the studio and to stay at home because the FBI had informed them that a crazed fan was on his way over with a hand gun!