Videos: How to trim a brisket
How to separate the point from the flat when it's done... and then how to slice it
(yeah, I know these are available other places, like here - but I prefer the downloadable Video podcast format of Weber Nation because I'm a QuickTime fan)
Video: How to truss a chicken. (I've figured it out from the pictures in Real Grilling and the illustrations in the Big Book - but a video would have helped immensely the first time)
Video: How to cook a bird on a rotisserie (especially how to set up the fire... My rotis chickens never come close to matching the juiciness of my "beer can" style chickens - I assume it's my technique that is lacking?)
Recipes: Things involving cheap meats are always welcome. After dropping hundreds on Prime Ribs, Briskets, and loads of baby back ribs - sometimes it's nice to grill up cheap stuff. (Pork chops, whole chickens, etc)
The principles involved in grilling are always good... Instead of just recipes - explaining why certain things are done and teaching some of the "theory" behind it can help guide future creativity... It's like learning the guitar: you can learn the chords and learn other people's songs - but if you learn the I-IV-V or the 12-bar blues, you're able to build off it to create your own songs...
Anyway. That's a lot of ideas.
I'm sure others have many more to offer.