Technical Users or Advance Users with some technicals.
Desc: Those that understand what it means by a full blown Linux, running Java SE, freedom, open-source, etc.
** IF Apps and Games are really important, skip this.
Devices: N900 --> Other Smartphones (Android/Symbian/etc) --> The "i"

Advance Users:
Desc: Those that don't really understand or think the above is important. They may ask, "What's the difference between full blown Linux and scale down Linux? How does it affect me?" or "Java SE? What's the difference with Java? Or simply Java? How does it affect me?". Basically, they are more concern with apps and games.
** IF none of that matters, only care about Apps and Games, basically, they're NOT looking for a smartphone but a device which have tons of apps and games (think PSP + Phone), then skip this.
Devices: Other smartphones (Android/Symbian/etc) --> The "i"

I Don't Care users:
If a picture worth a thousand words, a video is priceless: