I did a quick search and found that Goldman Sachs & Warren Buffett have started an entity to invest in 10,000 businesses
across America. It doesn't look like it would help the individual VA just starting out (it mentions a possible 4 employee minimum), but perhaps it's something for a multi-VA firm to consider applying for.
Here's the original article where I found this information: http://www.huffingtonpost.com/2009/1..._n_361569.html
I hope this helps someone!