Well this answers the question I had too, but I'm not thrilled about it.
My client just purchased hosting. She is on sabbatical in the UK right now and all her other currency choices were greyed out so she had to choose GBP. She'd like to be able to change it when she comes back to Canada. We're much more used to dealing in US funds here.
I wonder why her other choices were greyed out. Geolocation?