Mine is an Apple Wireless Keyboard.
I also have their wired version with a numeric keypad - they don't make a Wireless version that size. Besides, being right-handed it is quicker to acquire the mouse when it can be that little bit closer to the keyboard and more comfortable to move around without a twisted wrist.
I had wanted one of these:
Unfortunately, the use of mercury prohibited its import.
You see, I wanted to etch my own keyboard layout onto its blank keys, rather than muck around with yellowing sticky labels. I had developed an accessible layout for technophobes that kept the Alphabet in order, yet was marginally more efficient than QWERTY. This was confirmed by an analysis of the commonly pressed letters, i.e. ETAOIN SHRDLU as well as the alternation between the fingers of both hands:
http://en.wikipedia.org/wiki/ETOIN_SHRDLU
For example, the number line is changed to:
0 1 2 3 4 5 6 7 8 9 ÷ x - +
With 'escape' becoming 'erase' so that it can be used in conjunction with mouse selections.
All keys carry only one symbol and the Alternate key (a downwards pointing arrow below the Shift key) may be held to obtain frequently used mathematical and currency symbols. Greek letters are not supported, nor are accented characters for foreign languages. I made it for myself.
I really like the way Apple have made the Magic Trackpad fit alongside the left edge of their keyboard, I think it has great potential for use in 3D modeling software - i.e. spinning a selected object as if it were inside a trackball, rotating it whilst keeping the same side facing you and zoom. It would be nice if there was a way to have the mouse, or the stylus of my Wacom tablet select and operate tools upon this spinning 'ball' somewhat in the manner of a potter's wheel, but on a cursory investigation of the API they have the same HID codes - which in other words means that all pointing devices are linked to the one and only pointer (try using both a trackpad and a mouse at the same time to see what I mean).