Yes it would be nice if like recipes, scripts could prompt the user for information

Somthing like:

Tag: Value:
Span1 3
Span2 7
Span3 2

Where the number of inputs is defined by the script

Yes,this could especially be interesting for beginners, as they don't know where to change parameters of a function.
I always document all parameters and how to use them, but an input function could help and prevent setting parameters into a wrong value range and give some feedback if this happens.

It might be nice to allow scroll bars similar to the clashing importance input on the behavior menu. You give it a description, range for the scroll bar, increment, and default value for each input value.

I could suggest some ways to implement this, but I think a lot depends on how the foldit code was written and how it interfaces with the recipes on what is the right way to execute this.

A propos input:
A wait function, waiting for any input to continue would also be useful.

Simple input like readln would be cool :)
Fuction automaticly showing recipe output should be implemented at same moment.