The basis of the appeal would appear to be that Dennis didn't catch Carragher with his challenge. But that isn't usually seen as a good defence so we're not optimistic.

There's some confusion over the Keown red card. Most sources appear to agree that there can be no appeal over professional fouls, so Arsenal will not be lodging one. But Arsenal World quote Wenger as saying that there would be an appeal, on the basis that it was not clear that Owen would get to the ball before Richard Wright.... a defence which, if it's even made, looks more bound to fail than Dennis's.

Graeme Souness, manager of tomorrow's opponent's Blackburn Rovers, has said today that Arsenal are not a dirty team. Quite right too. See Ananova

Arsene Wenger meanwhile is quoted as saying that the small pitch at Highbury is partly to blame for our red card tally this season (see Football BC).

Rupe adds...
Well done Arsenal World! Although Arsenal cannot exactly appeal against it under FA regulations, Arsenal.com confirm that Arsenal are asking ref Mike Riley to review the Keown red card too. The defence...? They quote Wenger as saying Michael Owen only had "a probable scoring chance and not a certain one".