I've had my solo case since the 3GS came out, and I love it. I just got a second one as well, and wanted to post photos in case anyone is curious how the purple and blue look over a white iPhone. I had a hard time figuring out how it would look before I bought it - iSkin has a nice gallery, but especially in the case of the purple, a white iPhone makes it TOTALLY different. See iSkin's image:
And then the slight difference a white iPhone makes - click for larger (sorry they're a bit grainy):

I didn't mind it exactly, but I didn't know it would be such a change, which is why I thought I'd pass the word around. Here's the blue, which I also love:

(not sure I love the mirrored screen protector, but I thought I'd try it out)
My hope is that this may help at least someone's purchasing decisions.
😛
Oh, and sou1 so1di3r: I love those photos of your smoke knock-off case too. Probably also a bad choice on a white iPhone, but very nice on yours!