What's with all the desire to PEG to the dollar?  the point is to create a means of exchange free of the manipulations of governments.  Bitcoin gains it's value through it's unmatched transactional prowess---that can be paralleled with the REAL nature of gold (really just a chunk of shiney metal, it's industrial uses only make up ~20% of it's price) the reason gold was picked as a currency instead of some other metal or stone is the impossibility of counterfeiting (double-spending).  Bitcoins got that too.  Gold is a bitch to transport, measure, trade with, whereas bitcoin does all those things incredibly well. 

When placed against the USD or other fiats, BTC is also better in terms of transactions, better in terms of inability to counterfeit.   USD is inflated away just like all fiats, so bitcoin wins again.  The only thing bitcoin needs is time for people to get used to the idea of a currency that isn't controlled by a single govt or entity.  Which is actually a positive thing.

If Bitcoin were pegged to Gold, or the USD I wouldn't be interested.   again, I could be wrong, but when designing the perfect currency, it was in the abstract, Bitcoin.  Bitcoin is just real, better, and not a theory in an undergrad econ paper.  I'm a believer.