Okay, lets's assume that $1000/BTC in 5 years.
Shares are 0.00475 BTC today($0.06) at $14.00/BTC and that amounts to $4.75 per share in the future, assuming $1000/BTC
Now, think what will happen to the amount of BTC that will be rolling in Satoshi Dice's bank roll assuming $1000/BTC.. would it still be 33k BTC at today's valuation? Probably not. My concern is, I buy S. Dice shares now, but in the future the price of the IPO might go down (BTC value) because people may bet the same or even higher value dollar wise, but not BTC wise. The dividends then will be greatly reduced BTC wise causing a lower IPO price. I'm afraid when BTC takes off, it might leave S.Dice behind. It all depends if S. Dice can keep up with BTC's bullish nature.
Of any business you can invest in, there's precious few as likely to keep up with BTC.