I love mine - but I am sick and tired of the touch screen problems, bad speaker sound, T-Mobile 3G issues, and having to constantly fret over memory limits. And now that the power button died its even more of a frustration.
I have been looking at new phones, and I lament lack of a trackball, multi-color LED (in many phones), and the solid build quality of N1, but I feel like i have no choice. Actually I am at crossroads now - deciding to either get another N1 (which can be had pretty cheap) or go with some of newer offerings (currently eyeing the Razr).