One intrepid modder that goes by the name Timofiend decided that he wanted to help bring an Xbox 360 and PS3 closer together, by putting both systems in a PC case. While the creator has acknowledged that his guide wasn't written as a tutorial, it does give a record of how he was able to do it. Tim takes you through everything he did in case you wish to attempt to recreate it, from the tools and materials he used to the end product. The pictures and words of Tim do the project much more justice than my words ever could, but I think it turned out really well. Have a look to see the incredible work that he was able to do.