We're a little late on the notice this time around (two whole days!), but if you haven't done so yet, get yourself out to Nagrand and pick up your free gems from the Consortium! They're not exactly worth much on most servers now, since people are throwing everything they own on the auction house to get rid of it before Wrath, and thus tanking the prices on everything, but free is free. You might as well pick them up, even if you just use them as skipping stones at the lakefront.
If you've never done this before, let me break it down: Once you reach Friendly with the Consortium, Gezhe at Aeris Landing will have some free gems for you at the beginning of each month. As you gain higher levels of reputation, you'll get more gems. Not necessarily better gems, just more of them. Don't know where Aeris Landing is? It's directly north of that freaky diamond mountain spaceship with the Naaru in it, Oshu'gun.