When trying on a different computer on a different internet connection, I get:
http://pastebin.com/uEJWQ0Ru
Still not able to download on EITHER machine.
http://forums.technicpack.net/index.php/topic,972.0.html
Probably what's going on.
I've done the same thing on a second computer now that hasn't run the launcher and am continuing to get the problem.