For a title how about "Brain food for the Starving GM"
I don't think the plan here would be to get rich selling it as a PDF, but mmadsen certainly wants to be rewarded for time spent.
Under normal circumstances, I would have paid $2 for the list alone, as a 64 PDF I would pay more. The one thing that bothers me about PDF's though is for some reason I cannot bring myself to pay the full price of what a printed book of the same size would cost.
As for rules expansions, there are of course certain aspects of the list that couldn't be covered in depth, but I think a very nice approach could still be taken.
Treat it like a series of dragon magazine articles, each one covering one of the master topics.
And for my idea...
Every magic item has a name. No more generic plus one long swords, why that sword over there is known as Balric's Blade (It has a magical +1 to damage, and grants the user a +2 synergy bonus to wilderness lore.)