My thoughts after game 1:
Spezza, Heatley, Alfredson were on the cusp of dominating, but they never got a chance due to Anaheim's "bulldozer" strategy. I've never seen a team get hit so hard and so often. They had a lot of good chances and some great passes. The Senators defense was pretty lax, especially on the Duck's winning goal. Nobody was covering the slot!
Ducks won more battles along the boards, but were almost too aggressive, and they took a lot of penalties, which easily could have cost them the game (Ottawa was looking good on the power play)
The pattern with Ottawa seems to be that they hold back in the first period, save their strength, wait for their offensive lines to get keyed into the game. The Senators need to withstand the initial onslaught from Anaheim, and then they need to play smarter than the Ducks. They must set up Alfredson. The problem is the Duck's defenders...so Ottawa needs to draw them to the outside, and just flat out be faster.
My prediction is, the Senators win 4-3.