Facebook. First off, the release date was posted as "later than you expect" and along with the fact that they are obviously not even decided on tracks let alone near finished recording, I'd say it's unlikely that it comes out any sooner than April, assuming that there are no more delays. (which would be a very naive assumption)
About the songs, to use his words...
"has re-recorded parts of Mortar Grind and remixed it entirely for Road Salt Two."
and
"Well, the sound and the feel of the original version of Mortar Grind stands out too much from the nature of the Road Salt universe. It is now more dry, close and rugged - it has a meaner bite

If You Wait is one of my all-time favorite POS songs by the way. Destined for RS2.
Gone is still hanging in the balance, depends on how it works with the rest of the album I'd say..."