Bartek Skorupa has created a scritp for Blender 2.53 that exports animation data to After Effects. You can watch a demo on the use of the script here, and also download the script for your own use here!
Bartek Skorupa writes: I would like to present you the Add-On for blender 2.53 (beta) that allows to export animation data to After Effects. Below you’ll find the link to the video tutorial explaining how to install it and how to use it. The package includes the Add-On, the written manual and the example blend file that you can use for tests.