I have read more on weddings and sounds like the dinner afterwards is fun!
I attended a traditional Polish wedding a couple of weeks back - a few pointers:
1. Everyone lines up after the ceremony to congratulate the couple individually, this is the time to give gifts/flowers etc. and to roll out your best pre-rehearsed Polish phrase.
2. When they say 'the wedding lasts two days' what they actually mean is that you go back to the same place on the second evening and essentially repeat the meal - it doesn't actually last 48 hours (may seem obvious, but you can't be too careful).
3. When they say 'dancing' they mean proper old-school dancing with lots of couples twirling about and doing fancy steps - not the random leaping around in a darkened room that passes for dancing in my neck of the woods.
4. When they say 'drink' they mean vodka - but there are rules. Don't drink unless invited to by others or unless you can pull of inviting others to join you in a drink. Read my blog post 'Drinking in Poland - the Truth.'
5. When they say 'food' they mean heaps and heaps of delicious meaty grub that just keeps coming and coming until you lay on the floor and beg for mercy.