The good folks at Nokia Blogs have complied a list of Nokia devices that they believe to have changed the world. Though i Do have a correction with their last device all in all the list brings back memories.
Nokia Cityman - I agree
Nokia 8210 - I agree
Nokia 6110 - Nokia 3330 had a far greater market share and thus effectively it was far better at changing the world
Nokia 1100 - I agree, this was one rugged phone
Nokia 7710 - I think the Nokia 7610 was far better selling
Nokia N95 - I totally agree!
Nokia N8 - Full of Crap! The nokia n900 was and Is revolutionary especially with it's community support from the great TMO.