Well this is excellent news - Thanks so much, Havoc!
I hope some lessons were learned from this though about backups. (BTW - It may not be a good idea to have the ip address directly on display here or we may get similar problems to last time)
lol, so I re-built the ground and first floor of Rupture Farms in Single Player for no apparent reason. :P Ah well though - I'm actually overjoyed that all that work I did wasn't a total waste of time and that I can continue it.
Apparently MC Edit is a good program to use for copying blocks from one map to another, and like T-Nex suggested, if it works (I haven't tried it), it'll open up a bunch of new opportunities for us once 1.8 finally gets released.
http://davidvierra.com/mcedit.html