So I spent the last couple days selling Glyphs and re-selling [Vanishing Powder].

Trade Chat was filled with players asking, "where do i buy vanishing powder????" so I simply purchased stacks from the Scribe Vendor, directed Trade Chat users to the AH, and re-sold to them for 30G per stack. =]

I probably made about 3k gold just reselling cheap [Vanishing Powder] to people who didn't read the patch notes. From my Glyph selling, I gold capped one of my characters and the other is 50% capped. I had a lot of competition too unfortunately, but all-in-all it was a good day. Mat and ink prices sky-rocketed, so it was a good thing that I had made all of the glyphs (40 of each) during the weeks before. (Since ink requirements for Glyphs went from 1 ink to 3.)

All of the new 4.0.1 Glyphs can be learned from the trainer, 1 x Northrend Research (Living Bomb), and 1 x Book of Glyph Mastery (Colossus Smash). Don't waste any more than that, you won't learn anything new.

So here's an interesting gold tip:

[Glyph of Vanish] is currently bugged and no one is able to craft it. It will be hot-fixed eventually, so most players won't know when it will be available. But if you check the Trainer after each server restart, you'll be able to get and sell the Glyph before anyone else. For atleast the first few hours, you'll be able to sell it for 100-200G each.

Other broken Glyphs (not available YET) include [Glyph of Mage Armor], [Glyph of Armors], and [Glyph of the Long Word].

Mage Armor still might be available from your old crafted glyphs, but there's no way to make new ones - so they're very pricey at the moment and you should buy out all competition.

Don't advertise sales of these Glyphs in Trade Chat either, otherwise other Scribes will clue in.