[Tutor] Sync between Powerpoint slides and Video

[Guess?!?]

Hello All,
I recently came across couple of websites (www.parleys.com and
www.zentation.com) and loved the sync technology between ppt and streaming
video. This makes website experience look fast and impressive. I was just
curious to know the how is it all done. What technology/software is being
used to sync powerpoint presentations with video?
If anyone has delved into implementing this in Python or Zope/Plone
frameworks or any other technology ...Please share the knowledge ....

Any insight will be appreciated ...

Thanks,
G Arora.
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