Ethics of publishing received peer reviews
In the journals where I have been invloved as editor, author or reviewer (except in ones where the review process is open on the web), the implicit understanding has been that the communication is closed between the author-editor-reviewer. I have not seen any explicit rules stated by these journals to control against any such public dissemination but I have not looked for it either. I think that, particularly in cases where it is not explicitly stated that reviews are public, posting reviews without consent from the reviewer would be similar to publisihing someone private letters wihout consent. It is not illegal but ethically very distasteful. I do not think it matters whether or not the review was anonymous. Whether the paper was accepted or not would not matter either. I would consider posting without consent just as bad under all circumstances.