a european consortium claimed to have made solar cells that are cheaper, lighter and 20X better at collecting energy.. that will be the best way, for a while, to power a ship to the moon and back if its true.
I'd love to see Rutan add a second stage in the next design and boost itself into a cis-lunar orbit.
If using Kazaa makes you skittish, then try this guy:
Biglist Games
I suspect he's affiliated with the Russian mob, but he's d@mn cheap on software.