[vos-d] new vos concept: listen conditions

[Lalo Martins]

You probably already know I like this idea.  For things like web
interfaces it would be awesome, in fact my web framework idea had a
design very similar to this.

best,
                                               Lalo Martins
--
      So many of our dreams at first seem impossible,
       then they seem improbable, and then, when we
       summon the will, they soon become inevitable.
--
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