If anyone considers this, please us tempered glass. This says 'tabletop' so I assume it is. It's not a whole lot more expensive but it's much less deadly.

Thanks for the awesome link, I'm surprised I missed this Ikeahacker post. I might have to bring a dry erase marker along on a future trip there. I'm definitely going to do this for a future home office upgrade. Now I just need plan out some kind of dead simple rig for taking photographs of the whiteboard that would automatically sync with either Dropbox or Evernote. This might be a good use for one of my old android phones.

We did exactly this for a coworking space in town.

I suggest using a full-length bracket all along the top and bottom and siliconing the tabletop into place, and then putting little brackets on the sides.