The only "gadgets" I've named are my media centre PCs. The first one I assembled from components into a Shuttle chassis so that got christened "Bob", short for "box of bits". It is much easier in conversation to refer to "Bob" than "Media Centre PC" when using phrases like "Can you turn Bob on?"; "Are your pictures on Bob yet?" and so on.
When I upgraded that model with a Dell XPS PC that got the name "Bobby", derived from "Bob B".
I do refer to my Orange San Francisco phone as "Blade", but that's only because that's what it is (ZTE Blade), and again referring to it as "Orange San Francisco" is a bit of a mouthful that I don't want to have to say/write and I'm sure nobody wants to wait for me to finish saying.
Actually I've just remembered that when we had a hire car for three weeks while driving round New Zealand we called it "Colin". That's the first and last time I've named a car and it was in memory of a friend's little car which she called Colin and which was equally underpowered, but a brave little fighter.
My Samsung Galaxy Note (arriving today) will not be named. It will simply be known as "Note" or "Phone".