[plt-scheme] running an MzScheme debugger in Emacs?

Matthias Felleisen writes:
 > I (and nobody else on PLT) wishes to turn DrScheme into an Emacs  
 > competitor. I do wish to improve it to the point that Scheme- 
 > primarily programmers will prefer it any time they wish to program in  
 > Scheme.

How come?  Why not also improve Emacs integration so that
Scheme-primarily programmers who use Emacs will prefer PLT over other
Schemes?

--dougorleans at gmail.com