This is just a speculation, the reality will not be seen until we can trade shares again, but I think 1 BTC /share is bit on a cheap side.
edit: and, we have to remember that mining wasn't the only profit generator here.
I hate to break the speculation bubble, but please be aware that the posted (original) business plan only guaranteed a break-even first for the initial investors at a share price of 0.1BTC/share. After that the business plan is a bit fuzzy. It is up to the discretion of bitfountain, under the consultation of the ASICMINER board members, on how the "surplus" (profit beyond the 0.1BTC/share break even point) will be allocated. Large parts may simply go to a cash fund of the company for future growth and operations.
Thus if you acquire shares at a higher price point you may not be guaranteed break-even through dividend payments. You may however be able to get dividends and sell the shares after a while for a profit.
It all depends on strategic decisions down the road.