Got my N1 early yesterday, and I must say so far I am very impressed.
-First off, the screen is absolutely gorgeous. Online videos do it no justice. I also think the "not being able to see it in sunlight" issue is somewhat overplayed.
-I have had no troubles with the touchscreen. It is a smidge less responsive than the iPhone, but nothing that I'll be complaining about. I have also followed the tips about hitting the hotkeys towards their upper half and have experienced no troubles.
-The keyboard is a little different than the iPhone's as well. At first I found myself making some mistakes, but by the end of the day I was typing almost as quickly as I was on my iPhone. I'll probably try out Swype eventually.
-I was pleased to see that many of the apps that I used most frequently on my iPhone are also availible in the Android Marketplace (Shazam, Urbanspoon, Movies, etc.)
-The maps/navigation app is infinitely more polished than the iPhone version, as is the Gmail app (of course that only will apply if you have a Gmail address as your primary account; I haven't even looked at the other Mail app)
-The Calendar app is somewhat disappointing, but still suits my purposes.
-NOTIFICATIONS...wow. The N1 owns the current iPhone OS in this area. The notification bar at the top of the screen, as well as the lights on the phone, make for a great alert system.
-Haven't tried putting any music or movies on the phone yet. I have a feeling this is a battle the iPhone may win. I did play a few preinstalled songs on the N1 music player, and while it's not as polished as the iPod on the iPhone, it still does its job well.
-The integration with Google/text/voice searching is seamless throughout the device.
-One cool thing I like is how it automatically syncs Facebook profile pics to your contacts list.
-Oh yeah, this thing is wicked fast.
All in all, after a day or so, I'm loving this phone. Can't wait to get it even more customized to my liking.