Great news, especially given the horrible accounts from the recent arrests in the Kosovo organ trafficking ring:

UCSF Team Working on Artificial Kidney

The artificial kidney is still at least five years away from being tested in a human patient.... if [Associate Professor Shuva] Roy's team is successful, the kidney will be about the size of a large cup of coffee, and it would last for years, maybe decades, and require no pumps or batteries. Patients wouldn't need anti-rejection drugs either, because there would be no exposed natural tissues for the immune system to attack.