Why would anyone want bitcoins?
The point of mining is to get dollars, not bitcoins.
I (almost) never convert BTC to USD, whether I mine or buy. I have the habit of spending them.
More to the point, I think there are a lot of potential buyers out there, waiting to see where Bitcoin phenomenon will move. We experienced a lot of bad events last few months, but the price hasn't decisively reflected the outcomes and there is no absolute sign otherwise that the structure surrounding Bitcoin got over these issues. I'm confident that new enterprises are a lot sounder than the old ones but we need a more organic structure that will hold even though one node collapses. I'm talking about things like MtGox acquiring Bitomat. If we could have also saved MyBitcoin that way, it would be a great indicator of strength.
Alternative Bitcoin forks are also a question; will they be able to compete with Bitcoin without introducing new functionality? If an incarnation like IxCoin can survive for instance, it will really be a bad indicator in people's minds about Bitcoin being a sound idea (i.e. if anyone can come and print currency that can compete with Bitcoin, it's not really like gold, is it?). I'm not talking about all possible alternative crypto-currencies though, if it has different functions that creates value of its own, then why not? So I'm pretty sure at least some people are waiting to see how this situation will turn out as well.