Have fun, I was there in 2005, and a good side trip, besides Krakow, is a stay in Kazimierz Dolny:

http://en.wikipedia.org/wiki/Kazimierz_Dolny

Also, if you are listing Polish culinary contributions, you need to include:

Vodka (The first mention of which can be found in the court documents from Sandomierz in Poland dating to 1405)

and

Nalesniki, of course…