The Interactive Metronome neurotechnology company, with some assistance from yours truly (see conflict of interest disclosure), has put together a "Timing Research" packet that summarizes some (but not all) of the major mental timing (IQ Brain Clock) research studies published to date, some dealing with the IM-specific intervention research, others dealing with related background research articles.
Click here to view/download (warning...it is 5+ MB and may download slow if you are on dial-up or are using wifi). It will also be added to the key research articles section of the IQ Brain Clock blog.