Jordan -
Well, for starters, Bandon Dunes, Pacific Dunes, The European Club, Doonbeg (both in Ireland), Kingsbarns, Dundonald (both in Scotland) and Barnbougle (Tasmania) are modern links (or very links-like) courses built within the past 5-10 years. Tom Doak is doing a links course in SW Ireland currently as well. Nick Faldo is planning to build a links on an island of the west coast off Ireland.
The problem with existing linksland (and there may not be quite as much of it as you think there is) is that 1) much of it is in environmentally protected areas and 2) much of it is in rather remote locations that would make building a golf course a marginal business proposition. There is a ton of open linksland on the coast line around Loch Fleet in the Scottish Highlands (very near Dornoch & Golspie) that could probably handle another 2-4 courses, but is subject to both constraints I have mentioned
Clearly, the hot spot for links and duneland golf course development these days is in the mid-US, with multiple courses being built in Nebraska, Kansas, South Dakota, eastern Colorado, etc.
DT