My "why isn't it even available (on DVD, at least, would be nice)?" list consists primarily of HBO Films' Cast A Deadly Spell and My Best Friend Is A Vampire. I don't count the recent crappy transfer of the former.
And topping my list of properties that have yet to be treated properly is Babylon 5. I want it released on BluRay as a complete saga box set (movies, Lost Tales, Crusade, Legend of the Rangers... all of it), with new transfers taken from the actual original footage. It was shot in 16:9, anticipating the widescreen TVs that would come in the not-too-distant future, then cropped to 4:3 for broadcast. Then, rather than return to the original format for the TNT re-airings and DVD releases, they cropped the 4:3 picture even further to create a letterbox effect. The result is many, many shots where actors' foreheads or chins (or both) are cut off, subtle things at top or bottom of the screen that are now missing, and one egregious example of a full-frame "subliminal" PsiCorp message whose top and bottom lines are now half cut off by the letterboxing.
I also would love the boxes to shrink even more. I really miss when DVDs first came out and they were in standard jewel cases. You can fit a lot more of those onto a shelf than DVD and even BluRay cases.
--Jonah