check out their new popforge opensource project at googlecode. lots of lovely classes here. realy amazing audio stuff etc... go and check, till not too late! 
Please test our (PARK Studio) latest work created in Papervision3D.
This is site where you paint on 3D bus model. The winning painting will
be on real bus.
Sorry, site on russian, but interface must be intuitive )
Links:
main page (HTML) - http://www.improvise.ru/
draw page (Flash) - http://www.improvise.ru/bus/draw.aspx
gallery(HTML) - http://www.improvise.ru/bus/show.aspx?busID=468
few big examples:
http://www.improvise.ru/bus/viewbus.aspx?busID=468
http://www.improvise.ru/bus/viewbus.aspx?busID=651
http://www.improvise.ru/bus/viewbus.aspx?busID=506
http://www.improvise.ru/bus/viewbus.aspx?busID=526
http://www.improvise.ru/bus/viewbus.aspx?busID=96
How to get color for any pixel at stage, including Sprites, video, Bitmaps etc...
Easy. Just 6 lines of code.
var pickerBMP:BitmapData = new BitmapData(1,1,false,0x0);
stage.addEventListener(MouseEvent.MOUSE_MOVE,checkColor);
function checkColor(e:Event) {
pickerBMP.setPixel(0,0,0xFFFFFF); // enter background color of your SWF
pickerBMP.draw(stage,new Matrix(1,0,0,1,-mouseX,-mouseY));
trace (pickerBMP.getPixel(0,0));
}
Here the sources for my 3D voxel terrain. Enjoy. I hope this will be helpful for someone. )
Jerome Birembaut introduced his AS3 3D Physics engine. Looks like it use Papervision3D. )
Intro page http://www.wow-engine.com/ dont have physics 
so check some demos:
http://dreammania.net/datas/swf/WOWBoundAreaSphereDemo.swf
http://dreammania.net/datas/swf/WOWPlaneSphereDemo.swf
http://dreammania.net/datas/swf/WOWRotPlaneSphereDemo.swf
http://dreammania.net/datas/swf/WOWSphereDemo.swf
use arrow key for this one http://dreammania.net/test/wow/elidemo/Eli.swf
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