Well here's the update.
It's been going quite well so far without any real snags.
I assembled the top piece with some left over MDF I had laying around. I thought 3/4 MDF assembled would be big and bulky especially because I had to shove an LEDWiz in there. But it turned out not too bad at all. I was kind of hoping the mitre saw angels would come visit me but I was stuck with my skill saw.

Like I mentioned, I wanted the plexi to be against the wall so when you wrote on it the unit wouldn't jiggle around knocking on the wall. So I went ahead and sunk the top few inches into the MDF. Using my router to slice in nice and even.

Now of course I had to secure the plexi to the top and bottom unit so I grabbed my drill press and made a nice set of sunken screw holes. This wouldn't have worked with a thinner plexi.

Now I had to get power to the damn thing. Well, it's going to be on the wall right next to my cabinet so I went down to a local PC store and got a 12 ft USB cord that will run right down to the floor and into the cabinet for power. Do I have an extra USB outlet? No.
I drilled a 3/4" hole in the side of the top piece after making a pilot hole to see where I was headed. There's a little more room than I would have liked but it will help with any cooling I guess.

For the bottom piece I just used a 3/4" chunk of MDF and sliced a "pen ditch" using a new router bit. Worked like a charm. Just then the Gods of amateur wood working yelled at me telling me not to use the same length screws I used for the top. They would poke right through into the ditch.

Also, wrapping a large drill bit in some fine sandpaper was a nice discovery.

I just finished slapping on the first coat of paint and began to think of how I'm going to suspend the LED's to point down into the plexi. I went to my local art store and got a water based white marker. The kind bars use to write on menu signs. I was a bit nervous so I tried it on a chunk of test plexi and it works great. I will write down the brand on my next post.

I have created a graphic and am going to get my buddy to print out a sticker that I can slap on the front of the top piece. Should be rockin.
More to come!