I've added bitcoin payments, via the API available at http://blockchain.info/

Originally I was planning to run a bitcoin server locally and do it properly, unfortunately this is a prohibitively expensive (in terms of server bandwidth/space). So I ended up deciding it was simpler to use blockchain.

There is of course a risk in relying on a service provider for anything like this but its probably less of a risk than using paypal so we shall see how it goes.

The API is low level enough that we can switch to a locally hosted solution at a later date.

Behold its magnificents at http://dime.lo4d.net/dl/bitcoin and if you go there right now you get to see it when its in a horrible mess before its been made pretty by the art department :)