Has anyone created something like a tuxedo cake, but with different colors?  I want more than chocolate ganache drizzled - I want to do something using Harley colors or something close to flames but classier looking for a tiered wedding cake - any ideas?

You can make ganache with candy melts and get lots of really bright colors.  You can also make it using white chocolate and add color, but the colors will be dulled by the creamy color of white chocolate. 

Are you looking for something like this thread has in it's decorated cakes?  Take a peek, as they are really cool looking!!

http://cakecentral.com/t/776142/drizzle-effect

Wow, I love this effect!  Hmmmmm......

I didn't think about candy melts -- but the colors would be more vivid using them.  I'm afraid they may be too hard though.  How did yours turn out?

Google "melted rainbow cake" from Tablespoon! - just add a little more cream to get a looser consistency that will drizzle or less cream to get a consistency that will coat. 

Thank you!  I just pulled up the website and that is exactly what I had in mind!