1. Here's what Bletchley Park says on their first history page about their wartime role (http://www.bletchleypark.org.uk/content/hist/wartime.rhtm):
"The Poles had broken Enigma in 1932, when the encoding machine was undergoing trials with the German Army. They even managed to reconstruct a machine. At that time, the cypher altered only once every few months. With the advent of war, it changed at least once a day, effectively locking the Poles out. But in July 1939, they had passed on their knowledge to the British and the French. This enabled the codebreakers to make critical progress in working out the order in which the keys were attached to the electrical circuits, a task that had been impossible without an Enigma machine in front of them."
2. There's a memorial for the Poles at Bletchley Park (http://www.flickr.com/photos/ell-r-brown/5109679597/) and they have an annual Polish day.
3. There's a special page on the Polish contribution (in English: http://www.bletchleypark.org.uk/content/hist/history/polish.... and in Polish: http://www.bletchleypark.org.uk/content/hist/history/inpolis...)
I do agree, however, that the 2001 film Enigma was an utter piece of crap that depicted "Turing" as straight and a Pole as a traitor.