I have an existing product which has a Renesas microcontroller on it which has an external 8 bit bus interface. I'm looking for a 100Base-T solution which would probably be another micro (not necessarily Renesas) with a ready-made TCP/IP stack available for it. I don't want to put the TCP/IP on the existing micro because I don't want it to have to handle the extra workload.
Looking around, there seem to be plenty of vendors that do what I want, but I would be interested to hear from anyone who has done something similar so as to hopefully pre-empt any nasty surprises.