[plt-scheme] changing code font size in slideshow

On Wed, Nov 18, 2009 at 2:56 PM, Carl Eastlund <carl.eastlund at gmail.com> wrote:
> See (planet cce/scheme/slideshow), which provides (with-size <size>
> <expr>) and (with-scale <factor> <expr>) forms.  See also (planet
> cce/scheme/define), which provides (define-with-parameter <name>
> <parameter>) for constructing these kinds of macros.

I am unfamiliar with how code gets promoted into the PLT project.

What are the pros and cons for something like Carl's slideshow tools
getting added to PLT?