I looks like the new Edirol R4-pro does AES but only has 1 input, You could also look @ the Zaxcom DEVA IV, I think the DEVA II will also do 24/48 to 4 channels. The sonosax MiniR82 will do it if you rig up the proper cabling
EDIT: Forgot about the Fostex PD-6, it will do 6 channels via AES and a special 25pin cable.