Well I guess Gdansk's WHS aspirations are the victim of other sites success. I doubt this will get a place on the list, not because it is undeserving, but mostly because others have beat it to it. Warsaw already has its listing for its near total rebuilding after the Second World War, so Gdansk dips out there. There are plenty of Baltic trading cities already inscribed so Gdansk won't bring anything new to the table there.
It is a shame that Gdansk probably won't get a place of the elite list as it really is a very impressive city. The rebuilding of the city centre is very thorough. I found walking around it is much more impressive than some of the already inscribed similar sites (Lübeck for example). Not only is it a city of distinct vintage it also has a wealth of modern history, from its role in the start of WWII through to the heroic actions of the Solidarity unions at the shipyards, which were played an immense part in the collapse of communism in Poland and beyond. It is also a city with a lovely atmosphere, I really enjoyed wandering around, hopping between bars and restaurants.
I would certainly recommend a trip to Gdansk. It may not be a tick off the World Heritage List, however it is yet another charming European city where whiling away time strolling the streets and sampling the local delicacies was extremely rewarding.