Sing with me now: Dreamweaver, I believe you can get me through the niiiight.....
Okay, fine. Don't sing. I won't be offended.
This is the Spiny-Backed Orb-Weaver spider. They apparently come in various colorations, and are pretty common around the southern U.S., but this is the variety I generally see in my yard. FYI - they're completely harmless to people and other living things - except other insects, that is.
You absolutely have to click on these pix! I think they're cool. Don't you?