The Star Trek; The Next Generation episode featuring the Dyson Sphere, and Scotty, is on Spike right now. It's odd that the crew isn't more... astounded by the Dyson Sphere. Also, how come it wasn't ever mentioned or featured again in other episodes or movies? I assume that the Federation was trying to study and explore it. In the episode there is a mention of "surveying" it.
I love the concept of Ringworlds and Sphereworlds.
-Wade