Hey Christine...don't know the hardware you are contemplating, but you might try searching both Hafele and Rev-a-Shelf, two companies that do a lot of innovative cabinet organizer hardware.

One thing to consider...if the interior pull-out comes out automatically when the door is opened, I presume, it pulls out the entire unit, not just the top, middle or bottom shelf. That means you can't easily access stuff on a lower shelf, which might be more of a pain than having to take the extra step of manually operating the pull-out. I have a magic corner unit from Hafele, which operates as you describe for the "front" unit. And while, I still think it's the best solution for my dreaded blind base cabinet corner, I definitely lose ease of access to stuff in the middle of the bottom shelf.

Oh, crap.
Now who's stupid?
I forgot completely it would pull both out.
Or, I could just hook it to the bottom and then the doors would already be open if I needed the top.
Yes, I have to look at those pages and haven't.
I've also found excellent devices at Rockler, drawerglides.com and a couple other hardware sites.

I'll let you know -- but than you for an excellent point.