sorry, i meant 750 gb hard drives (my g5 is full of 500gb seagates). i've been surfing forums and product pages, and brain storming all day, little fried. i guess i'm going to have to do some more research before i can even ask the right questions.
here are some things i found that could be modded into my franken p2 store

1tb nas
http://www.newegg.com/Product/Product.aspx?Item=N82E16822204059#spec

macbook express card to sata
http://www.barefeats.com/hard71.html