*Monitor CoasterBuzz to see what we're saying about them. :)
Intamin -
http://www.intaminworldwide.com/ Their transports look cool. I would love to see a 'mass transportation coaster' if you get what I mean.
Giovanola -
http://www.giovanola.ch/ They do a lot of other stuff, check it out, not much on coasters though (they're a tiny part of what they do).
Yup, Arrow does custom fiberglass work. Also I heard that the Navy is interested in utilising coaster LIM/LSM & Air technology for launching their fighter planes off aircraft carriers.
Plus one day NASA wants to build a very long LIM/LSM catapult on the moon for launching cargoes into orbit. Wild hey?