UPDATE: Not all of these cakes may make you laugh as a coupla of the new one are slightly risque. I don't think any are NSFW but I just thought I would warn you.
This has to be one of the funniest sites because it is cakes people have paid for. This doesn’t make fun of the home baker or the person who is learning to decorate. Check out http://cakewrecks.blogspot.com/ .