Hi!
Finally I found some time to do a render for the contest, too. It uses Hoodedman's laser ies light (from J the Ninja, http://www.luxrender.net/forum/viewtopic.php?f=36&t=6485#p66844 ) and a set of glass tubes with a scattering interior media for the letters and a simple glossy emitting material for the logo. The laser light bounces through the tubes and generate some nice caustics. The current image has about 3kS/s but it is still rendering.
Here are the different light groups:
