Display	3.5 inch touch-sensitive widescreen display 800 × 480 pixel resolution
Processor and 3D accelerator	TI OMAP 3430: ARM Cortex-A8 600 MHz PowerVR SGX with OpenGL ES 2.0 support
Memory	Up to 1GB of application memory (256 MB RAM, 768 MB virtual memory)
Mass memory	32 GB internal storage Store up to 7000 MP3 songs or 40 hours of high-quality video Up to 16 GB of additional storage with an external microSD card
GPS and navigation	Integrated GPS, Assisted-GPS, and Cell-based receivers Pre-loaded Ovi Maps application Automatic geotagging

And this isn't even the best part, it's based on Debian Linux that would make a port from the desktop to the phone easy. One thing some people might think is bad is that it doesn't have multi-touch as iPhone have. One reason for this could be that iPhone have patents on that technology which sucks in my opinion. The good part is that as it is single touch and as you can move a mouse just as you would on your Desktop. It will be easier for programmers to again port there programs to the N900 from Linux.

Things that remain to see is battery life, something most mobile devices lack these days. And oh don't ask why I write in English there is no real reason for it.