http://www.theregister.co.uk/2004/09/15/pwc_swpat_are_a_threat/
claims that
] Services and accountancy firm Price Waterhouse Coopers has formally ] identified software patenting as a threat to the growth and success of ] ICT in Europe.
and goes on to give a bit more detail. Worth including a reference in the letter? If the US' Federal Trade Commission and PwC are both saying that swpats are bad, it adds a bit of clout to the argument.