I know the Pound is annoyingly strong against the Dollar right now... but look what happened when I tried to renew my Last.fm subscription today in Pounds (a valid option from Last.fm's own dropdown menu).
This is a problem that can haunt some start ups. I'm surprised to see Last.fm suffering.
Multi-currency is a digital marketing element that is big in Europe but a non-issue in the States. It's one of the biggest adjustments American or Canadian search marketers need to make when they come to practise anywhere in Europe.