I just stumbled upon this amazing skin by DanilloOc on wincustomize.
This is the first skin I've switched to after VistaXP by Kol. It's a great medium blue skin that has clean and smooth lines.
Although it uses all the new features of WB5, they are all subtly implemented, which is something I hope becomes a trend. You'll notice with the window capture attached that translucency is not overdone, which is a problem I had with Kol's skin when it was on top of windows with lotsa text.
DanilloOc's skill has progressed leaps and bounds since he first started submitting to the various skinning sites, and now, I'm comfortable to put him up there with MikeB314, Kol, Essorant and ^^Gabriel.
Get it from Wincustomize or DeviantArt