I think SilkRoad is going to give Bitcoin a hard time. They are literally tearing down civlization as we know it apart.
On the SilkRoad forums, people are now getting fully auditable Harvard, MIT, Cambridge, etc. college degrees for a low cost in Bitcoin. You can call the office and they will tell you your scores and congratulate you.
Blank prescription scripts, drivers licenses… On other sites, counterfiet money, credit cards and more is available and these things are selling more rapidly than ever.
The average blow joe can get into the deep black market with only a click of a mouse when it used to take years of social connections.
Bitcoin has made this possible. There is no other way you can transact goods and services as easily and anonymously.
This is either going to be really big and society is going to evolve or people are going to come down on Bitcoin hard.
What's certain is things are changing.