It's still fairly early-stage (self funding, saving money by doing a lot myself + hiring Russian aerospace engineers) so if there's anyone here on HN with a spare 20k/100k/1MM they want to spend on awesome futuristic technology, my email's in my profile :)
I'm keeping the specifics of my company under wraps (to everyone but potential investors), but the idea is radically improved long distance transportation here on Earth with a near-zero carbon footprint as one benefit.
I've considered various US gov't funding options, which can be really nice (they don't take any equity & some are pretty lax with how you spend the money) but those take a while to get, and you generally need someone who's got experience writing proposals if you want to have a good chance.