It will depend on your server, as to what flooding the market is.

The economy is pretty strong alliance side, adding 30-40 gems a day won't be a large impact. I'm actually selling (uncut) gems to the largest seller of cut gems now. He basically said to charge him my cost in mats, and then mark it up 100g per gem. Given the prices on the server, that's close to 100g profit for each of us (per gem) ..

It depends on when Cataclysm comes out, as to how much gold we will have saved. I'm up to 15 alchemists, and need to level toons from 60th if I want more (which I do). I have the two +10% experience heirloom pieces (shoulders & chest) for the entirety of the three teams I'd like to have become alchemists. Outland is pretty fast with slow flyers + heirlooms.