  We present the results of extensive time series photometry of the pulsating
subdwarf B star KPD 2109+4401. Our data set consists of 29 data runs with a
total length of 182.6 hours over 31 days, collected at five observatories in
2004. These data are comprised of high signal-to-noise observations acquired
with larger telescopes and wider time coverage observations obtained with
smaller telescopes. They are sufficient to resolve the pulsation structure to
0.4 $\mu$Hz and are the most extensive data set for this star to date. With
these data, we identify eight pulsation frequencies extending from 4701 to 5481
$\mu$Hz, corresponding to periods of 182 to 213 s. The pulsation frequencies
and their amplitudes are examined over several time-scales with some
frequencies showing amplitude variability.
