My Mobi skin case arrived 4 days ago. It's the first skin case I've had so theres nothing I can compare it to, but I like it alot - it slips on easily, the rubber surface is soft, it doesn't attract lint. For me the tackiness of the surface is a good compromise between being able to slide it into a pants pocket and not having it accidentally slip out of my hand or that same pocket. There are little ridges corresponding to each keyboard button, so you still get the tactile feedback for typing - the pictures on their website don't show this clearly. They have a nice color selection- no neon colors. The only con has to do with alignment: the cutout for the microphone is ever so slightly misaligned, so that it covers a small fraction of the microphone - but no one's had trouble hearing me so far. If it really bothers me I'll figure out a way to expand the hole by .5 mm, more than enough to expose the whole microphone. The other misalignment is solely about pickiness- the cutout for the earpiece is not Perfectly centered over it (again, <.5 mm lower would do the trick), but it doesn't cover any of it (unlike the microphone). All in all, not bad for $25 including shipping.

You can find it on bberry.com. (I tried to post the link but I guess I'm too new on this forum...)

edit: the 1 mm.-thick cover recesses the trackball by that much, so I had to up the sensitivity by "10". No big deal.