Yeah, macfan57 is right, Oct. 14 is the US release date (as of now, hopefully this one won't change either) and apparently HBO owns the rights to the Mirage show (and not Warners) so I'm guessing that's why we haven't seen a Mirage DVD stateside yet.
As the Tusk doc was on Warner Home Video, I assume WB own the rights to that so I'm hoping that if they like the sales figures on the TITN one then hopefully they'd put out the Tusk doc on DVD as well.
Someone made a good point on another Mac board about this recently in that due to the Led Zeppelin DVD selling by the truck load, this seems to be the reason some of the DVD firms are FINALLY waking up to the fact that music DVD's will sell for them and if it's ones like these that they already own the rights to then it's cheap and easy for them to put them out on DVD (therefore, not MAJOR sales but with little overhead, they'll get more money out of it them they must have originally thought they would). I just hope this is true about it finally getting through to these companies about how they should put out more Music DVD's.
It does seem strange though that they wouldn't have started their releasing of old music video titles on DVD with the Tusk doc though (as that is the lineup that would get them the most sales etc.) but whatever, I won't complain about getting this one

I just hope that they didn't feel they had to release TITN instead due to some legal problems (or whatever) as to why they couldn't/can't release the Tusk doc as I'd like to give them enough credit to think that the releasing of the Tusk doc was their first choice over this (from their $ interests etc.) but anyways, we can hope that there is no problem in this regard and that they can (and would) release the Tusk doc on DVD soon too.
From the vague packaging details of this TITN DVD, it looks like they're trying to get people to think LB is on it to get more sales but again, I guess we'll just have to agree with them that if they get the sales they want out of this then hopefully they'll dig out the Tusk doc and release that on DVD soon as well.
John