  We continue our programme of extended single-site observations of pulsting
subdwarf B (sdB) stars and present the results of extensive time series
photometry to resolve the pulsation spectra for use in asteroseismological
analyses. PG 0154+182, HS 1824+5745, and HS 2151+0857 were observed at the MDM
Observatory during 2004 and 2005. Our observations are sufficient to resolve
the pulsations of all three target stars. We extend the number of known
frequencies for PG 0154+182 from one to six, confirm that HS 1824+5745 is a
mono-periodic pulsator, and extend the number of known frequencies to five for
HS 2151+0857. We perform standard tests to search for multiplet structure,
measure amplitude variations as pertains to stochastic excitation, and examine
the mode density to constrain the mode degree l.
