I can't pull up CS3 at the moment, but I think the option under "Export" was "Adobe Media Encoder" which was separate from "Movie" for example.
A shortcut that directly sent you from a sequence to the export settings for cs3-ame-whatever it was called, would have been nice. After all, you had to keep doing that over and over, after each one was exported.
That was a huge feature addition: batching exports in CS4!
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