That's right, Colm and is definite - five additional weekday trains in each direction from Mid-September. The draft timetable was indicative that some would run through to Cardiff etc..., making them infinitely more attractive than a mere Fishguard to Carmarthen shuttle.
And things are looking promising for a reopening of the erstwhile station at Fishguard & Goodwick - (around a mile up the line from Fishguard Harbour station and better located for local users).
While recognising that these additional services are primarily aimed at the local population (ferry passengers already have a daytime and night-time connecting train in both directions seven days a week), from an Irish perspective they do allow one to stop off a few hours in North Pembrokeshire. If the Stena Express is still operational on the route next Summer it will likely have a connecting train both to and from the ferry.
More info here: http://fishguardtrains.info/