I got mine on iTunes, is still there, classified as a 'TV Show' since it's technically just a long episode and not a movie or anything. Amazon Video has it as well. Also Hulu Plus, but that's not really buying it. Just another option if you've got it already.
EDIT: added some links.
Here's more info.
All tour dates between Aug 1st and Sep 15th have been cancelled.
Sons of Bitch. Shit.
Weird that you asked for this. I've been looking for the same thing for YEARS, and haven't heard them since 2008.
This torrent has EXACTLY what you're asking for in it. Trust me, I've been wondering why I couldn't find this shit ever again... and finally just came across it literally 20 minutes ago. Hope you enjoy, man!
just got the picture disc in today(Cover, interior art(silver pitures from the comic with starfield see through) side view of Tritons helment, Galaxy with the space ship when the light hits it right.). the barcode ends in 22458 and has the metallic cover
but just buy it off amazon that is the place Brendon himself recommends and he would get more of the proceeds though there because he is the seller. and you get the Mp3 version for free.
It's believe the Metalocalypse one is being released on DVD, so really I think the move is to pre-order the DVD when you have the option. That's why I made this post, if you're into ATHF, you could preorder this one on Amazon to show HBO that there's an audience for these DVDs - https://www.amazon.com/Aqua-Teen-Forever-Plantasm-Digital/dp/B0B8BL3PGB