I got mine from Demonoid where I have lots of bandwidth to spare and the first two were indeed ISOs with MD5s. Jedi however was lacking an MD5 which is what I think might be causing the issues with mounting in Disk Utility for the Mac.
I dont mind grabbing it from MySpleen my concern would only be destroying my ratio with a 7+ gb file. Bandwidth from my ISP isn't an issue, just ratios. Blah.
As for usenet, thats sadly not an option since my ISP doesnt have newsgroup abilities. Double BLAH.