Watched data on network location for multiple ATV2s

Would it be possible to keep the “watched” data on a network location?

I would like to set up multiple ATV2s in the house, and it would be great for them to share the same database. 

I have just got another ATV and this would be a handy feature to have.

It takes ages to go through and mark tv programs and movies that I have already watched on my first ATV.

Can we get this in an upcoming version? 

Have you tried enabling in FireCore Media Player (Settings / General / as this provides this functionality for most shows/movies?

Does that change the watched indicators as well?

It does for me!

Yep. It will use trakt as the master, so if you mark something as watched on the site it will get marked as watched on your Apple TVs as well.