They don't have a RSS Feed as such, they have their own system called Pasties.
You set up how you want your deviations shown and it will then give you a section of code to paste into your website. You get to the pasties set up by going into "Edit settings and Profile" hidden away in the menus at the top of the page.
I'm not sure if you need to be subscribed for this or not, but i think it should still be there.