off to krakow for a weekend in march and looking for cool places to stay. Something out of the ordinary for whatever reason - arty or over the top or mad. Is there/do you know any?

yes, that is the whole point of the trip. I have never been to poland. My gf has but she missed Auschwitz so we are back now to see it.

There you go. I've done Poland many times, but not been to Auschwitz.
Hope you have a real good time.The Polish people are just incredibly wonderful - and the Saturday nights are amongst the best you'll find anywhere. Make sure you've got a bed before you go out.You'll need it. They just don't let you leave until you're beyond staggering.
Kriss - Manchester (another 24 hour party city!!!!).

Flamingo Hostel is pretty good - http://www.flamingo-hostel.com/. Not really "crazy" but it's a bit quirky, very close to the main square and has a nice vibe.

I have stayed at the Any Time Hostel in Krakow and really liked it. The location is good, in the Jewish district, lots of funky, artsy cafes/bars surrounding it.
The breakfast was especially good and the staff was very helpful.
As a side note, I was looking at Hostel World's page on Krakow hostels and realized there are a huge # to choose from. I had a bad experience at a hostel in Krakow once, but can't seem to remember the name. Just make sure you go with a hostel that's been reccomended to you, don't just choose the cheapest one like I did;)

I am going in May and hopefully staying here, this place is really quirky.
http://www.holiday-rentals.co.uk/Poland/holiday-apartment-Krakow/p68453.htm?uni_id=60586

I stayedat the Flamingo and was shocked at how horrible it was. from their site and a vote I saw it looked good. When I stayed there it was expensive, depressing. Facilities were bad and staff really rude.

I wouldn't have a problem with that - as long as my room's has got a floor. If the mattress, pillow - in fact the bed as well, were all missing when I got back from some of my nights out there, I wouldn't have noticed.
Best cure for a hangover in Polska???? A glass of chilled ale at 8am. Luvlee.