2010/5/24 Jeromy-Yu Chan (Jerry~Yuyu) jerry.tschan.yu@gmail.com:
I think both wikimedia foundation or WM Poland can help you on this :p
I am not quite sure if the letter from WMF might work as the WMF is not a Polish organisation. Anyway, WMPL although is not directly organising Wikimania may send such a letter. For that purpose we need: *Full name of the applicant (as written in passport) *Passport no, home address (as written in passport) *Duration of stay in Poland (dates of arrival and coming back).
Bear in mind that the list of countries which signed an agreement with Poland about visa-free traveling is quite long. The current one can be found here:
http://www.msz.gov.pl/Countries,which,citizens,are,not,required,to,have,a,vi...
If traveling from countries from outside EU which are on visa-free list, bear in mind, that without Shengen visa you can enter Poland, but crossing border of other Shengen country (although there is no passport control in trains and when traveling by car) might be illegal, so if you plan to do this you need a Shengen visa anyway.