You're more than welcome. I'm an Australian webmaster so I'm in the same boat as you.
After looking at the above links it seems the cheapest way to get into Europe appears to be the puchase of a U.K Limited company for a few hundred dollars. Jordans & Secretariatservices both offer packages for this.
I haven't made my mind up as to exactly what to do, but Gibralter does look good.
As for billing...I've seen others suggesting:
http://www.hughesbilling.com/
Though I can't say I've ever heard of them. However, that doesn't mean they aren't good...just not as well known.
Anyone else have any ideas or solutions? There are plenty of Canadians & Aussies who need these services.