Pressure Probe
Thanks to everyone who has responded! To give a bit more detail, I can definetely feel flexion when pressing with one or two thumbs. Under the right lighting conditions you can see movement in the crack as well when you flex the frame by pressing against the bottom bracket area. Also I'm guessing the crack has gotten worse since the bike fell over. When it first fell, I checked the bike thoroughly and didn't notice anything wrong. Granted I could have overlooked this, as I way mainly checking the wheels, spokes, drivetrain etc. However on the last couple of rides, I seem to remember hearing a creaking noise that I hadn't heard before.
One bike shop employee (who is an Orbea dealer) told me that he would ride the bike no problem at all. And bacisally that was that, just to keep an eye on the crack and see if it gets worse.
The other bike shop owner actually took the time to look closely at the crack, took a picture with his own camera, and recommended I do the same. He would contact Orbea (he is also an Orbea dealer) and see what they say after looking at the pictures. I'm really glad I took that high-resolution macro shot with my digital camera. You can see in so much more detail the crack and how deep it actually goes.
So depending what Orbea says, I will also take terry b's recommendation and contact Calfee to see if they could repair the frame and how much that would cost vs. a replacement deal from Orbea. I'll post an update as soon as I have more details.