avaaz.org has a petition going on to free the south korean hostages. the goal is to reach 70,000 signatures.
as of this post they have 68,874.
from their site,
The Taliban are guided by the Afghan Pashtunwali code, a principle that requires “hospitality to all, especially guests and strangers” – and this kidnapping is a clear violation of the code, offending the weary people of Afghanistan on whom they depend. So it’s time for the global community to stand with Afghanis and South Koreans, demand that the Taliban to honour their code and release the rest of the hostages. Sign the petition NOW —
To the Taliban leaders,
Please honour the code of the Pashtun people, respect aid workers as guests in Afghanistan and release all hostages unharmed.