I bought a set of grips for my lite. It's not pretty, but it cut down on the hand cramps quite a bit. I got the ones called the Swing-Grips from Gamestop. Not sure if they still carry them or not anymore. They don't list them on their website last I checked, nor have I been in a Gamestop since I got flashcarts. Best Buy had them at one time too.
They give you that extra space along the sides that really help make holding the DS more comfortable.
It also has a space underneath where the DS sits for 3 games and an extra stylus. When you have your DS closed, it serves as sort of a case. No ports are blocked other than the stylus in the DS. The power button switch becomes a slide switch along the right side of the Swing-Grips. Each of the cart holders inside it can hold 2 full sized SD's (or the converters
). Also, since the case bulks up the system a bit, normal sized GBA carts don't appear to stick out as bad as they did. The case is plastic, but the area where the DS sits in is a rubberized material that wont scratch up your DS. As far as I know, the grips only come in white.
It works for me....aesthetics don't matter to me, just functionality.