TV's Frink said:

I'm rather shocked to hear it isn't on DVD, frankly.

Warner Bros. and Fox have been in a legal pissing contest over releasing the series on video for ages. (IIRC, this made the "Return to the Batcave" reunion tv movie a tightrope act.) Thankfully, the 1966 movie was covered by a separate deal, and has enjoyed a long life on video.

I read over at the HTF that the live action "Legends of the Super Heroes" tv specials Hanna Barbera made in the 70's will be coming out via Warner's made on demand DVD. Adam West and Burt Ward returned as the dynamic duo.