For all you Star Trek nerds like myself, Startrek.com has just relaunched their website and they have quite an extensive store, and lots of Star Trek info. Best of all, you can watch free episodes of the Original Series (all of them as far as I can tell) and Enterprise (most if not all of them too). Hurry on over to http://www.startrek.com/.
Here is more information on the Dyson Sphere from Wikipedia.
This site has been promoted so much and by so many, that it hardly needs any help from me, but it is way cool. Jeff Russell’s Starhip Dimensions compares the spacecraft from almost every science fiction tv show, movie, anime, and many books as well as a few real-life space ships. If you ever wanted to see which is larger: Star Trek’s Enterprise, the Battlestar Galactica, Farscape’s Moia, or Star Wars’s Star Destroyer, now you can. If you are using IE (or Firefox with the IE Tab add-on) you can drag the images around and set them one atop another. Yes, I know this makes me a big nerd, but I don’t care.
The setting for Princess of Amathar is a Dyson sphere. I read about it many years before one appeared on Star Trek: the Next Generation. It is the ultimate construction project for a species. From a story-telling perspective, it provides a writer with an unlimited amount of room for his characters to roam around in.
Here is more information on the Dyson Sphere from Wikipedia.
City of Amathar 