I have had the N8 for a week and a bit.

I love it. The camera is just great. Loads of apps available too.

But there is something about the N900 which still draws my attention. I believe it is the 'open-ness' of the OS and/or the hardware keyboard.

The UOG (USB ON the Go) feature is great. I was able to plug my wireless keyboard/mouse into the N8 and it worked great.

I am really happy with the N8 and use it as my main phone atm. The N900 is just a device (mobile/tablet/mobile computer) which can be used to show off Nokia (e.g. Dual Boot with Nitdroid)