Zyvex, at http://www.zyvex.com/, is a Texas company whose mission is to
develop the first assembler. They don't have a very clear timeline to when
they will achieve it, although I saw "5+ years" mentioned.
They aren't asking for funding on the page, but if anyone wants to ignore
my advice I'm sure you could contact the company and find out if there would
be any opportunities to participate in future funding rounds.
Hal