I enjoyed this topic.
My first road bike was a Schwinn, and I currently have about 5 of them in various stages of completion (nothing rare or expensive, just more common ones). I don't know why I keep buying them, but there just too hard for me to pass up when I find them at garage sales. I occasionally find the time to get one of them fixed up, and then either sell them off, or give them away.
When you posted this, I did not think your frame was a Schwinn, but decided to kept my mouth shut, and watched this thread develop. Your frame set ended up being pretty cool, and was definitely a very nice find! It was fun reading though the replies, and learning a little bit more about the hobby.
You should definitely clean it up, and get it back on the road. It will be a nice ride! I'm also a Mountain biker, but my interests have really started to shift in the past year. I'm now spending most my riding time just leisurely cruising around my local town in the evenings. Since I started riding locally, I'm still finding new interesting routs, and scenic sites to snap a few photos nearly every trip.