Well, I don't show off my projects too often, and I'm feeling especially enthusiastic today...
I put my new sub and amp in today. I haven't covered the sub box yet, as I am going to do a custom console later on. Here's where I'm at so far:
Alpine 10" dual voice coil (500W capable), my own box made from 3/4" MDF, and relocated ECM. I was very impressed with this speaker for the cost! The box took a while to get just right; I made a cardboard box for several different designs until I got it big enough without hitting my shoulder and with the proper angles. The box is small (.5 ft if you account for the sub), but it works. It's angled to be parallel with the firewall and the shelf under the window...so when I make my console it will look like it was supposed to be there. 
Here's a picture of the box/shelf angle comparison
MTX 350W @ 2 Ohm. This amp wasn't the cheapest, but it is very small! I liked that the most, along with it's advertised 2 ohm stability.
All LED brake lights! The LED is from a Cadillac; I made a fiberglass housing with lucite face for it. This LED is shaped almost *exactly* like our roof, and really looks like they used the same shape for our roof and the caddy trunk!
I am still using "prototype" brackets, to make sure they will hold up. I've got about a thousand miles on them so far, and they're holding up good. I'll be making a looong drive (about 7000 miles round trip) in the next month, so after that I'll be sure they will work. I've already weather tested it, and a VERY bad 'bama storm/downpour didn't affect the light.
Once I've got the light finished, I plan on posting a "how to" on the forum of all the steps I took and the parts I used to do it. I really think it looks like it belongs on the Fiero!
Finally, a full shot of my car today, for those interested.
Special thanks go out to Cliff for the forum, MinnGreenGT for the how-to on the LED taillights, Skitime for making me re-think the placement of the brake light, and Sqoach for unintentionally causing me to get some good stereo components.
Next projects...3.4, self-made side scoops, self-made console, custom LED side-markers, and the list goes on.
Thanks for letting me share!
Bryce
88 GT