Fixed my knee problems riding a SS (I wonder if the Biopace changed anything? ), hope it will improve even more when I'll finally build my fixed wheel... I can do a 35km ride three days in a row without any knee problems right now, three or four years ago I would have cut my leg off just to stop the pain I felt after riding a bike for such a long (cough cough) distance!

Edit: oh and I've got a pair of chick's jeans...... but I have a very nice butt when I wear them so my girlfriend says it's ok!