The last release was an alpha so it really doesn't show off much of the potential of the project. Heres the project page which includes a link to the wiki and a download link for the old version:
http://sourceforge.net/projects/openmobile/
The next version is a beta which also means all of the important parts are complete. Should be finished in the next few weeks (I've learned to be conservative with release dates). All of the code is up to date on the svn server but that probably wont help you unless your a c# developer.
Take a look at the wiki for all the design philosophy stuff as well as how to skin and feel free to post in the forums with questions and/or comments. There is a skin designer available but its clunky and was more of a POC-the next version is a full skin designer and plugin IDE; remind me later in the week if your interested and I can release it early (its done just waiting for the rest of the project to be released).
I'm sure as a SD user u've seen my work all over their forums-its taken a lot of work to get to this point but I can honestly say this makes SD look like something a little kid did with crayons.