bitcoin isn't anonymous at all if you want it to be worth something
as soon as you exchange the money and take it out you link it to yourself and leave a trail that's easy to see for example
http://blockexplorer.com/address/1DV...9MCxeGEtmMmQCh
you can see what wallets the money is going into and coming out of and if you follow it long enough you would be able to see them arriving at an exchangers bitcoin and thats who would have the info on identity