Brew fresh coffee. Take care of the food orders (and maybe go for special pick-up as a treat). Make sure anything that hinders their smooth progress is handled by you. Noise? Go deal with it. Something not where it should be and makes their life harder? Chase it like a rabbid dog and solve it. The best way to ensure their success (and thus cover your ass, if that's your persuasion) is to, precisely, do whatever you can to remove the obstacles to that success.
But heed the warning: if you're staying just so you can keep an eye on them, you're making a huge mistake. If you don't trust them in overtime, then you have no reason to trust them in normal work hours, and your problem is something much bigger and uglier.
Simply put - though VB was "wildly successful" - but how many pieces of software built on it are still around *because they were built properly*? Most of those tools have been thrown aside because they were grossly inadequate in performance, architecture, design, etc.
I was a witness to countless fusterclucks and saw how many systems had to be re-done from scratch because some genius businessman believed what he read on the brochures only to realize that there was no such promise and now his hordes of customers were demanding delivery on the promises made. Needless to say, there were no shortage of *REAL* programmer jobs in those days
The problem was never with the language per-se, as I'm sure the problem won't be with Rev4. The problem was always with design, architecture, concepts, and implementation choices. As noted above by the xkcd reference, there's no substitute for clarity regardless of the tool you choose to implement your program.
I'm not knocking the tools themselves, I'm knocking the fact that they're billed as ways to "bring programming to the masses".
Just like not everyone should handle nuclear material or toxic substances or operate on a human body, not everyone should *program* computers. As such, the really big benefit I see for this kind of tool is as an end-user interface mechanism (or facilitator) - especially in conjunction with language recognition. There are some interesting ideas there that are definitely worth exploring...
Any given program will expand to fill available memory.