do you have a list of shareholders and number of shares?
No.
Well from this message on the GLBSE site, "You will be able to get back your bitcoin, and if you want to reveal your username, email, and a bitcoin address to accept payments with, you can continue your relationship with the issuer of any assets you hold," I would think they have some intention of making this available to you at some point, although if they don't I imagine there's not really anything anyone can do about it.
Also, I don't really know how things work on your end; did NASTY have any funds stored on the site from sales of shares, do you have possession of it, or is it all tied up in mining hardware and pre-orders? Thanks in advance, just trying to figure out where NASTY and its shareholders stand.