That is MONEY.

Awesome. Thanks for that tip.

For anyone who's having trouble finding it, it's in:

Global Render Settings > Mental Ray (tab) > Environment > Physical Sun & Sky > Create

[Fellow Newbs: If you're not seeing the Mental Ray tab, you'll need to go to Window > Settings/Preferences > Plug-in Manager, then scroll down until you see "mayatomr.mll" and load it, then check back in your Global Render Settings and you should see Mental Ray as an option in the drop-down next to Render Using:]

Once you've created the MR sun and sky, the Hypershade window is handy for making tweeks.

Thanks again for this tip--that's exactly what I was looking for!