If you're a big fan of pink colors, check out this Pink PC Kit. It will definitely drive your other half nuts with such a garish color (relatively speaking), but chances are you'll prefer to spend even more time in front of the computer after picking this up. The entire Pink PC Kit comes with a pink wireless mini mouse that works equally well in both Windows and Apple environments, while the pink steel case that it comes in won't look out of place on your desktop. Not especially when you can recycle it as an impromptu (but fine lookin') storage case for miscellaneous knick knacks.
Good to see this mouse doesn't rely on the 2.4GHz wireless range, instead taking the Bluetooth route with the mini mouse. Just make sure your computer has a spare USB port behind in order to slip in the Bluetooth dongle. The included pink mousemat rounds off the £17.99 Pink PC Kit, so all you need to do is expand your collection to pick up a pink PC case, a pink keyboard, a pink monitor...you get the picture.