I think the fastest route to 39 rigs is to pay dividends, because this will result in more IPO shares being sold, thus resulting in more capital that can be used for rigs.  If all dividends are used for new rigs, we won't get new investors and it will actually take longer to accumulate enough capital to buy rigs.

Nefario is supposed to have a new GUI interface for GLBSE in the next week, which could significantly expand the number of potential investors.  I don't think very many people are capable of using the current command line interface to GLBSE.  I think we should give these new GUI-using investors a good reason to buy SIN.