I am interested in using coreboot on a Tyan S2915-E:
http://www.tyan.com/product_SKU_spec.aspx?ProductType=MB&pid=541&SKU=600000041

Quick disclaimer:  I don't actually have the system setup yet, so it is impossible to run, e.g., "lspci -tvnn", etc.

With that aside, here are the details, as per the FAQ, and to the best of my ability to provide them:
CPU:  AMD Opteron, presumably would acquire most recent socket F variant
Northbridge:  integrated into CPU
Southbridge:  NVIDIA NFP3600 / NFP3050
SuperIO:  SMSC SCH5307
BIOS:  Phoenix BIOS on 8Mbit LPC Flash ROM

Thank you,
Pete Stevenson