You guys are lifesavers. Before I had a clue what I was doing, I attempted to load a softmod using the Splinter Cell exploit that had been pre-loaded on a memory card. I'm not sure what happened, but I was getting errors (something about the softmod finding modded files on the C:drive even though I had only copied over save games to E:??) Anyway, in frustration, I managed to delete my backups as well as delete linux and it left me with an XBOX that wouldn't boot to the dash, or play games.
I thought I was screwed, but after taking a few hours to read the tutorials on this site, (Hotswap and this one) as well as finally understanding what it was that I was trying to accomplish, I gathered all the stuff I needed and attempted a hotswap to get my XBOX back into working order. Lo and behold it WORKED and I have the NDURE softmod working, and all my backups work!
Feeling adventurous, I decided to see if while I had the XBOX open I could try to use a spare 120GB drive I had lying around, and again, following the tutorials I got everything to work. Amazing. I totally thought I had a brick and would have to spend another 100$+ to get this thing repaired.
Huge props to all the people who have posted tutorials and made all these wonderful homebrew apps.