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Power factor correction - a new high tech way

In a recent issue of Analog Device's Analog Dialogue, there is an article
about doing power factor correction using a DSP and a shunt regulator to
essentially synthesize any matching reactance.  The nifty thing is that it
can compensate for current waveform distortion (say, that created by a spark
gap on the output of an inductively current limited transformer?).  Not that
I advocate going out and building all the hardware to do this,  rather than
buying a stack of PFC caps, which work "good enough", but, something like
this might be interesting in it's own right, say, as part of a power
controller of a large TC type system.

http://www.analog.com/publications/magazines/Dialogue/archives/33-09/filter/
index.html