The normal rules apply to this forum. There is, however, one rule that I'd like to establish about picture posting: please do not post large images (let's say, over 300x300 pixels) directly onto the forum (with the img tag)! Please link to them.
Also: Images containing mature subjects is an iffy deal... Generally I say that a visible warning along with a link to the image is good enough, but if it's pornographic, or whatever, post it to BKO. I'll let you guys draw your own conclusions on what should go where, but please be responsible. ^^