I know this is some serious thread necromancy but after reading the post about the new map resource for the Trans Caucasian theatre I was reminded of the following site and it's specifically useful for Poland, hence resurrecting this thread. I think some of you already know of it but for the newer members, it's might be useful even though the maps date from 1944.
It's one of the few sites that I've found that has free, good quality, 1/100,000 scale topo maps of some of our areas of interest and could be particularly useful for Vistula River scenarios.
http://www.lib.utexas.edu/maps/ams/poland_100k/
Edit: and this site is worth checking as well because it has some of the maps that the Texas University site doesn't have.
http://digitalarchive.mcmaster.ca/is...acrepo%3A18813