It's a letter thanking Poland, and Mr. Wlodzimierz Marcinski, Poland's Undersecretary of State at the Ministry of Science and Information Technology, who spoke out at the EU Council meeting to prevent the software patents disaster.
Basically, it's because this guy stepped forward and spoke up that the European Union didn't decide to screw people over by adopting a similar patent travesty to what the US has (where people can patent things like "1 click buying", among other asinine stuff).
Software developers especially, may wish to sign the letter. I'm still holding out a hope that the EU will smarten up and drop the whole software patent thing for good, and that maybe, just maybe, the US will then pull their heads out of their asses and follow suit.
Yeah, I know, I'm a dreamer. ;-)