How do I withdraw my bitcoins and spend them? I run a small business online.  I am interested in using Bitcoin to accept monies from my customers but to be honest the whole thing has me a bit confused.  I am in the UK how would I be able to exchange my Bitcoins for £ sterling and then subsequently spend it?
Trade them for USD, GBP or EUR on a trading site such as https://mtgox.com and transfer it to your bank account.

Or you can spend them directly at any other business that accepts bitcoins as payment.