trackballs are okay. I like it better than the 8-way directional pad the Droid has. I'm surprised theres no dedicated camera button.. My G1 has one, and its a nice in that it works like a quick key too (ie hold the button down while in any application and the camera opens up), however since the first Android software update I never really use the camera key to snap a picture. I find the trackball, but more especially the virtual key, much easier to use because it keeps the camera much steadier than the small hardware key. It's kinda like the GCN's z button lol..
as for the HTC Inc... it looks okay. I can't tell if thats a trackball either, and the pic isn't all that great so its hard to tell what the phone actually looks like. I personally think the N1 is pretty slick, despite the odd color of it. If you had that in a glossy black, well you'd pretty much have the Incredible don't ya think?