Second revision of the S5L8720 bootrom. Found on iPod touch (2nd generation) devices sold after 9 September 2009. Units with this bootrom can be differentiated from those with the first bootrom by their model number; the new ones' model number begins with "MC, PC, and FC"
It is not vulnerable to the 0x24000 Segment Overflow exploit.
It is vulnerable to the usb_control_msg(0xA1, 1) Exploit.
For "Symbols", see also Address Mapping, although that's probably for the old bootrom only, but might be similar.