Your site is back up, and I can see the issue now. I'm not sure it's related to Jetpack though, since you do not use any of the Jetpack gallery features on that page.
I would suggest that you try deactivating the NextGen Gallery plugin first. Since your theme already comes bundled with a Gallery module (Prettyphoto), you might not need both, and both plugins might conflict with each other. If that doesn't help, you could try to deactivate all other plugins, one at a time, to make sure the problem is not caused by a conflicting plugin.
Let me know if it helps.