Ethan, one of the most passionate Program Manager's I know about Media Center, has just released his own enhanced Caller-ID plug-in for Windows XP Media Center Edition 2005. Called "MCE-YAC". With it, MCE serves as a client for YAC- "Yet Another Caller-ID" server for Windows which will distribute Caller-ID info from any capable modem on your home network to any PC. Unique features include:
Receives network messages from a YAC server and displays them on your Media Center .
Supports custom images for each telephone number, area code and state/province.
Displays locations for unrecognized callers (ones without a picture for its phone number or area code). No more wondering, “where the heck is 775?”
Call log support
Ethan has also released the source code for the project. If popular enough, it may make sense to release via SourceForge or similar, but I'm not sure how much improvement could be made- take a look.
Update: Here's another enhanced Caller-ID plug-in that builds on the integrated caller-id feature in MCE called TAPI-REX