Steve,
Yes, the *ist or *ist D have HSS. The 360 flash is probably the most
versatile flash Pentax has produced. It can be use in manual or auto
(with good f stop range) on everything from an MX all the way up to
wireless HSS on an MZ-S with modeling light (strobe).
... Yes, the 360 work on all currents modes, according with the body features: manual auto TTL P-TTL
The only bad feature: no scale for "APS" coverage, only 35mm/645/6x7
Michel

