They had some different devices that can be put in a 5.25 bay. LIke USB plugs or possibly a Stereo Jack for head phones, or a Midi jack like they use for game controllers. Also some places sell the removable hard drive bays so you can place a back-up hard drive in a 5.25 bay. Some of these devices also have small fans that can pull fans over the hard drive. Some places also sell kits for lcd panels that can display case temp's or fan speed information. They had some kit they showed on toms hardware that let you put different kinds of jacks depending what you wanted. Places like
www.tiger.direct has a lot of items like this.