I don't see why the VPAID spec (or at least a subset of it) couldn't
be used for communication between the pub player and the ad logic. I
think that we should push for a standard way to pass JS based ad tags
in VAST. The current non linear node with a .js file url in the place
of a SWF url is nice option.
something like:
<NonLinear width="300" height="50">
<StaticResource creativeType="text/js"><![CDATA[http://.../
ad.js]]></StaticResource>
</NonLinear>
Not sure about Linear Ads. Perhaps overload a <MediaFile> node with a
js file?
-jon