Montreal and Detroit
Marian Hossa (now of the Chicago Blackhawks), played in the 2008 Stanley Cup Finals for Pittsburgh (and lost), played in the 2009 Stanley Cup Finals for Detroit (and lost), and played in the 2010 Stanley Cup Finals for Chicago (and won).
25
The Stanley cup finals have only went up to 7 games and never past.
The Dallas Stars defeated the Buffalo Sabres in 6 games.
2004
Detroit Red Wings and Pittsburgh Penguins. Detroit won.
Actually the US has not won any Stanley Cups as the trophy is not a national award given to national teams of any country. Many NHL teams based in American cities have won the championship, including this year by the Boston Bruins. For a list of US based teams that have won, simply Google "Stanley Cup Winners" and see those cities for yourself!
yes, red wings and penguins have met in the Stanley cup before.
2 The leafs & the islanders
There are thirteen US metropolitan areas with four major sports teams. Of these, eight have had all four teams reach the finals.
No, as it is not possible for teams of the same conference (and currently of the same division) to ever meet in the finals round.