I saw Aquiris u3dobject but it depends on JS tricks to do it. Is there a way to embed the Unity webplayer, or just call it, in a simple pure SWF?
No thats not possible.
Unity will only talk to JS and can only be called from that layer and the same holds for flash.
you can not embed unity into flash nor vice versa either, the “js tricks” there are to establish any communication between them, so not so much tricks as “the solution to the question on how to communicate between them”
Any other opinion? 