We like that and so should you. For one, the browser is pretty stable, and it supports flash, video and applets. No more harrumphing when the iPhone loads a Flash-based site, showing us the blue-square-question-mark thing.
Plus, this phone is fully configurable in ways the iPhone may never be, at least, not without spending an inordinate amount of time hacking away.
The N900 is expected to be available later this year and the price has only been guessed at but will likely be in the $600 range.