I hope you can, someday! Unfortunately, I think Python (as an interface) is one of the things holding Sage back. I very much appreciate having a lispy, mostly functional language when writing mathematics oriented code.

And then, there are the docs....

I appreciate what you do, but your competition has a big manpower advantage and a huge head start. Like I said, I truly do hope you can beat Mathematica at its own game someday, but it doesn't look like that day will be anytime soon.