Slightly excited...
I've always been a bit disappointed with Nokia phones... Seems like in the past they have always had pretty good hardware that was let down by the Symbian OS. I've always liked the cameras and speakers on Nokias... I've had a Nokia N95 and Nokia 5800 and felt disappointed by both.
With the Nokia N900 I want to get excited... but I can't afford it! I've recently had the HTC Hero, which I don't regret, so it'll be difficult for me to get my hands on this exciting piece of kit.
It'll be interesting to see if it actually works... New operating systems on phones always have teething problems so I'll probably wait until next year and see if Nokia are still making any worthy handsets.