TTH Speed
This is a simple program I wrote that averages all of the hashing speed values in DC++'s system.log. For it to work, you need to have system logging turned on (File | Settings | Logs | Log System Messages. Place tthspeed.exe in your DC++ log directory and run it. It also keeps track of past Max / Avg / Min values in a log file.

Download:
TTHSpeed (136KB)
Changelog:
-- 1.2 --
Switched to Intel compiler and optimized for P4 Prescott class CPU.
-- 1.1 --
Added logging.
Fixed calculation error with SI units.
-- 1.0 --
Internal release