Here’s one of my favorite CM themes so far.  Dark Dream is a dark, glossy theme for Android.  Currently in version 1.8.1.2, this theme has been around for a little while and features a sleek, streamlined look for your phone.  If you’re into dark themes like I am this is a winner.  Here are some of its features:

The functionality of this theme begins before you even unlock your phone.  Pressing the on button reveals a screen showing the time and other information about your phone.  From this (and screens linked to it) you can see your battery level, control your music playing on your android device, and even display a message giving contact information to someone who might find your phone if you lose it.

The unlock screen is nice as well, blending in with the rest of the theme:

Also of interest are the home screens, which have hints of design based in Android 2.0:

Overall, I really like this theme.  The dark colors have a nice sheen / glossy edge to them and pop off the screen as result making for a nice UI experience.  Definitely worth a try for anyone with Cyanogen Mod.  If you want to try it, just scan the following QR code, or check the Dark Dream XDA-developers post.

Screenshots