There's an article on The Register about ebooks and VAT:
http://www.theregister.co.uk/2010/01/14/ebooks_vat/
It seems there has been a change in EU law, such that governments will be allowed to charge the same reduced VAT rate on ebooks as on books from January 2011, or earlier if they wish.
[EDIT: As pointed below, this change is for ebooks supplied on a physical medium only - now electronic delivery.]
Spain has already done so.
It might (just) help if UK based members of Mobileread signed up to the current petition (closing 21st Jan 2010) on the Number 10 web site:
http://petitions.number10.gov.uk/eBooksVAT/
It seems to be good news for ebook buyers in the EU - if governments take advantage of the new regulations.