In the Newsletter section of John McCutcheon's website (he is current(?) president of Musicians Local 1000), and at the e-tradnet website for Irish musicians, currently being updated by Steve Cooney.

Sorry I don't have the bookmarked sites to hand, I'm at a different computer, but if no one posts the links, I'll do it as soon as I can.

BTW, neither of the websites (McCutcheon's or tradnet) have much beyond a mention of it, and a web search proved fruitless. Which is why I asked here. I too have heard many horror stories about musicians getting a bad deal from Green Linnet.