> I am wondering if there are microcontrollers capable of
> ethernet connectivity, TCP/IP, and functioning as a software
> audio codec for an audio stream at a maximum of 64 kbps?

Sure.  There are MIPS, ARM, PPC, and Coldfire chips that are
capable of doing all that.  Open up most any consumer wireless
router or IP phone and you'll see one there.  You may need
extra (external) RAM to do it all, though.  You might consider
100pin BGAs as beyond the edge of "microcontroller."

BillW

-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist