I've built a product - how do I take payments in the UK?
cperciva: For Tarsnap, I just use PayPal; I don't like it, but they're better than the alternatives.Since you're in the UK, I'd recommend looking into Google Checkout -- I understand it's available in the US and UK, albeit not the rest of the world.  Then you can offer your customers a choice.EDIT: I'm also looking forward to using Amazon Payments -- so far it's US-only, but I'm sure they'll be expanding to the rest of the world any decade now...