If this topic interests you at all, this is a must-read. You'll learn more about internatioinal consortia than you could imagine. This is a really good core source document.
"To facilitate further discussions about the mission/activities question, I have pasted in (see below) the missions of the international consortia, networks, and associations that I know of. I've listed this information in reverse chronological order, in part to see what the newest consortia, networks and associations have decided to focus upon. If you know of any others that I have missed, please email me and I'll add them here. Please keep it in mind, though, that some of these missions are evolving as I write, and the websites I link to are variable in quality and how up-to-date they are."