Re: ...VAT for 28 different states... @Tom 13
Well VAT was relatively simple until this change...
There is a good introductory article from a US perspective on the change here: http://www.happybootstrapper.com/2014/im-us-whatll-happen-just-ignore-eu-vat-changes/
But for the full mind numbing impact, do look at the "full listing of VAT rates in different EU countries"...