There's been a full demo project with just about every release of Sonar. But I can't find them on the cakewalk website anywhere. I have about 8 or so in my collection. Guess I could load them upto Gobbler if enough people wanted them.

http://www.cakewalk.com/Support/kb/reader.aspx/2007013323
 
I actually load this project off and on, since it is a good "stress test" to tailor buffers, etc. (mute the final mix down and let SONAR process the rest of the project). Oddly enough... this runs my CPU at only 14%, but often crashes X3 on me (audio engine will drop out). I have never gotten X3 to run this project in that fashion cleanly.