I've changed the whitepaper to reflect the original agreement, 10,000 sianotes total at 0.00039% each. I do not believe that I will be changing either of these numbers again.
This is a wise decision, I think. Based on the price and demand relation, it may bring more revenue to Siafund than a higher price. On top of that, as a company, you always can build your own infrasture to mine Siacoins to make more revenue since you pay low fees.
Looking forward to the beta.