Hey all, a buddy of mine has been working with the Rosetta Stone team on their latest product which has JUST released. He tells me it's pretty amazing. Check it out, guys:
Rosetta Stone Announces TOTALe, Language Instruction With A Social Bent
and then he says this site is for games and activities and all and it's kinda like a free demo:
Welcome to RWorld!
Apparently they've been hiring tutors like CRAZY so guys, check this out a bit. The price tag is high but hey, if you're serious about "self study", this might be what you've been looking for.
I asked him about how high it goes, and he said the activities and live tutoring scales with where you are in the program, which goes to the point that you'd be conversationally fluent (which means you can get around in whatever country it is relatively comfortably).
Good luck!
(PS this isn't spam, I swear. I have no connection wth the company apart from my buddy working there, and I won't use the software myself.)