Boy, sounds like you tripped in just at the right time!
Is what you call poplar aspen, or is it that eastern poplar (tulip) ? If it's aspen, don't give up on that wood.....if you find a decent piece it is really nice carving and holds detail well. I use mostly aspen (big tooth), but quaking is also a nice wood. They are both a mite harder than basswood, but really nice clear straight grained and like I said, holds detail really well. It tends to fuzz almost exactly like basswood, and finishes the same.
Al