I think Pentax is smart to offer products for "fashion conscious" users in order to give themselves a marketing edge.
The Pentax K-x is a great camera, and you still can buy one in black.
You don't have to get one in turquoise or fuschia.
Sure... these wild colors will seem silly to many consumers, but they will appeal to others.
I'd be more concerned if Pentax ONLY offered their cameras in bright colors.
But fortunately, all they have done is given you a wide choice.
Which is exactly the same thing that GM. Toyota, and Ford do...
http://jalopnik.com/assets/resources/2008/07/New-Chevy-Camaro-RS-Color.jpg
Personally, I like the charcoal grey Camaro at the end of the third row.
But the teal one is nice too. At the begining of the last row....