I don't want to. I'd like to see as many dm aids (adventures, settings, guides, etc) from previous editions to be translated into 4e for current GMs. WotC needs to learn that if they provide for the GM that the GMs will bring them more players. And it's the GMs that buy most of the books.
A Red Hand of Doom 4E conversion was posted on these very ENWorld forums. It was an extremely well done conversion that really captured the custom Hobgoblin leaders and Dragonborn abominations while most of the other monsters were pulled unaltered from 4E sources.
Admittedly, I came to DnD during 3.5, so most of these module names mean little to me. But I have "Village of Hommlett" and "Shrine of Tamoachan", and both were really good. So, I'm going to second the "update them all" move.
Still, specific conversions I'd like to see:
- any 3.5 Eberron adventures. Eyes of the Lich Queen and Voyage of the Golden Dragon, in particular.
- Red Hand of Doom
- Savage Tide