I agree they have rivalries, as everyone's got someone on their ****list. And the old school rivalries are great ones for sure, but at the moment I don't think anything's at the intensity level of the Pens/Caps.
Calgary and Edmonton could heat up with a meeting in the playoffs though, for certain. I think there's a mutual Boston/Montreal hatred that could heat up then as well, and a NJ/NYR one that could definitely heat up considering NYR picked up everyone's favorite douche Avery again...
Right now though the Pens/Caps aren't just a rivalry between teams, it's really pure hatred with **** talking about each other's players by both sides. It's been going on all year and you don't see that often in the NHL (the **** talking anyway) like it has been this year. I guess the Caps office are trying desperately to keep Penguin fans from getting tickets too, as we've dominated their home for decades, and now that they actually can win and some people in their area want to see them play, they are upset we're still trying to come down and **** with them.
I think the other rivalries could get warm come the playoffs, but I still argue nothing's quite on the level of Pens/Caps at the moment.
Ottawa/Toronto doesn't count by the way. They're not making the playoffs and I don't even think they care when they play one another, or anyone else for that matter.