Most of those look like wasted screen real estate or awkward contrasts. I could probably get along with one of the first two. - Daniel J. Pritchett

Dark blue and orange (top middle) or that green sunset one (3 down, on the right) - Phil G

Ohhh... you can skin Gmail now? How do you do that? - Lindsay is in 20-ten

The third one down on the left, looks like a very clean and crisp theme. I hope these work for Google Apps, cause labs hasn't even been working for my apps account. - Jacob Burke

third down left column - Cee Bee

Brown one #1 - Clay Newton

great taste, Jacob & Cee Bee ;) - David HC Soul

I like the top middle blue and orange too ... is it just me, or do some of the others remind you of cheesy bank check designs? - Nadine Schaeffer

I went with Tree. - Alex Scoble