NBP has cut their rates by 0.25 percentage points, recently, indeed, but that usually causes the PLN (not: PLZ) to lose value since polish bonds will now pay less interest and this normally discourages foreigners from investing in them.
I would say it is very difficult to predict currency futures below is a link to the historical's tititudorancea.com/z/gbp_to_pln_exchange_rates_british_pound_polish_zloty.htm
Correct PLN is the new abbreviation and PLZ is the old one, its a little like UK or GB, from the reports I have been reading there is future concern for Polish bonds, the reason for the current take up is down to the limited options and an appetite for emerging markets, PLN was one of the top five performing currencies in 2012, the main question one has to answer is what is supporting the PLN and how long can the euphoria last, the current strength of the PLN in my opinion is not based on fundamentals more on a lack of options.
The only bet I would make myself is on the NBP lowering interest rates at the next meeting.