Brendan Bolles OpenEXR plug-ins (covered in April) for reading a multi-channel EXR in AE are now 1.0. Brendan added a few more features, like storing color information, to these filters. OpenEXR Image Viewing software from ILM is also provided.
Brendan also made a similar plug-in (pictured) for Photoshop, ProEXR. which also includes an extra AE plug-in that will turn a layered EXR file into a series of source comps automatically.