Is there anyone going to Poland sometime in the near future who would like a cell phone to take with them? Using your Canadian cell phone is usually expensive and/or difficult because a) most are not GSM and b) they are usually locked to your current phone company so just buying a Polish SIM card won't do.
You can unlock an appropriate kind of phone (I can point you to a website that will do it for you), but here is another option: My European phone has a pre-paid Polish SIM card with about 50 zloty worth of talk time left, which will be good until the third week in September. I'd like it if someone could use it in Poland, top up the prepaid talk time a little, then bring it back with some talk time left, which I could use when I go back for my checkup in October. Another advantage of this is that you could give your family and friends your phone number before you go.
To eliminate the hassle of passing things back and forth through customs, it would work best to do this with a fellow Canadian. Please e-mail me if you're interested.