I've modified the Mach's modification to TTSClock (here) adding the other two strongbad clock types (Angry and Soothing) as well as randomizing which one plays.

I've only got 256k upstream DSL, so I'm hoping somebody else could host this file (mach, perhaps you could plop this where your original is?)

Anyway, here's the link: http://sandgnat.com/strongbadclock/.

Chris