yeah, USB will likely be your best bet.
Get a USB Hub and stack those fuckers on top of one another.
edit:
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=547772&CatId=392
one or two of those should do the trick, then get external burners like the one fry posted, and have at it. You could use your ME skills to fabricate a case for them if you’re into the whole “organization” thing