Flaskataur, a large Tauren who sells all glyphs for your class, has been moved from Temple of the Jade Serpent to Stormwind, Orgrimmar, and Valley of the Four Winds in Mists of Pandaria beta.
Quite a number of cosmetic glyphs have been added to the game especially for monk, hunter, mage, priest, or shaman.
Some exampels are [Glyph of Borrowed Time] which displays as an icon above the users head, while [Glyph of Shadowy Friends] extends your shadow form to your non-combat pets.
One new ability that leaves me a little envoius of hunters is Glyph of Fetch: Teaches you the ability Fetch. Command your pet to retrieve the items on a nearby corpse!
Mages get a quasi new pet from Glyph of Conjure Familiar: Conjures a familiar stone, containing either an Arcane Familiar, Fiery Familiar, or Icy Familiar. (This lets you conjure an item that lasts until you log out or summon other familiar, after changing specs. It does not show up as a permanent vanity pet.)
For a complete list of the Gylphs added, please check out the Vanity Glyph post at Wowhead.com