On the main EN World page, there's a scoop that Birthright is coming out for Third Edition; birthright.net has made the announcement:
I never played the original Second-Edition Birthright, but from what I've heard about it, I'm quite excited about the new edition. Even if you don't care for the setting, the rules and suggestions for ruling a kingdom should flesh out high-level play.
The upcoming official conversion
New Edition Rules Book!
Rediscover the Birthright® campaign-a land of legend-with this new edition. The fallen god of evil, Azrai, was sundered into pieces and his blood continues to empower his wicked followers. Prevent the spawn of evil from gathering their former lord's power and rekindling the bonfire of destruction! Updated and revised for maximum adventure.
The Birthright developer group has been hard at work the last few months, putting together a 3rd Edition version of the Birthright world. The upcoming document will feature the most thorough conversion to date of our favorite D&D Campaign setting!
The work that has been done, and is still underway, will stay true both to the spirit of Birthright, and the spirit of the 3rd Edition rules. It will feature a complete conversion of races, classes, bloodlines, monsters, and more. New skills, feats, and other little mechanical goodies have been designed especially for the Birthright world. The revision of the domain rules promises to bring them fully up to date with the changes that happened between 2nd and 3rd Edition.
I never played the original Second-Edition Birthright, but from what I've heard about it, I'm quite excited about the new edition. Even if you don't care for the setting, the rules and suggestions for ruling a kingdom should flesh out high-level play.