Move the decimal point six places, i say. I reckon it's better with just two zeros after the dot.

https://bitbills.com/
works fine for me too.

I would like to use such an exchange, and would buy bitcoin for stirling right now. Can this be done already?

Should we have identical singular and plural forms: one bitcoin, two bitcoin? I would prefer to keep the plural "s" out of this. It's hard to see how identical forms for bitcoin would complicate life, and I think it might help simplify things, at least in a marginal way.