We're looking to simplify the licensing of all jQuery projects and want to remove the dual licensing of MIT/GPLv2 and switch to just the MIT license (specifically the Expat license). Since MIT is compatible with GPL, it should not affect the inclusion in Drupal. However, it is my understanding that the main reason jQuery is dual licensed today is because of a request from Drupal. Ben Alman has had a similar experience, which is documented on his blog: http://benalman.com/news/2010/02/on-licensing-my-code/
Since Drupal supposedly requested the dual licensing, I just wanted to open up a discussion about the licensing terms and find out if/why there would be any concerns with us switching to just MIT.