What are some things I can do that are useful and/or fun with a 5.25 bay?
I don't have / can't be bothered to find a picture of the bay I have, but I picked up a 2.5" hard drive enclosure that fits six drives on hot-swap sleds in a single 5.25" bay. I've currently got four 64gb ssd's in it, and will be putting two more in once I get them. I'll have all six in a RAID array for fast-as-fuck access times.
hdd cage if you're a hoarder with a small case