It's still doing it's rounds at various venues around the US atm, so probably will not be released for a while yet. Also I am sure I read somewhere it was shot in HD so would be nice when (if) it get's released it is available on HD-DVD as well as regular format.
I really enjoyed the king of kong, was very intresting to see footage of then and now and seeing some real expert's at play, at the risk of upsetting someone I am not going to comment on the politics of it as everyone has their own opinion, but suffice to say it did make good viewing and it's a shame there are not more films/documentaries like it about other games. A look at some footage of manufacturer's (like sega/taito etc...) would be well cool, seeing them make the games from start to finish.
Regards.