>Not only do you have to worry about the massive amounts of radiation emitted by the magnet, but also normal radiation. At near light speeds radiation will blue shift thus giving it a higher perceived frequency. This turns all kinds of normally non harmful radiation into serious problems which would require massive amounts of lead to shield the passengers and equipment. Until we figure out how to compress the fabric of space or other such "sci-fi" methods we probably wont get to far in the universe.
----------
Damn, Eric, I forgot about the blue shift. So, I guess it's the beach on the Adriatic again this summer, rather than Antares. Ah well... God knows what kind of beer and wine they are brewing there anyway.