As you might know...you can use EG to write code, and document that code inline as you do today.
You can open SAS programs that reside on your local disk, or on the filesystem of a remote SAS server, edit them in place, run them and collect the results within EG.
You can also add links to external documents, such as Word files and other text files, into your project. Thus you've used EG as a place to gather and assemble your work, but it also remains accessible and usable by other tools outside of EG.
You might be interested in this upcoming web talk:
http://blogs.sas.com/sasdummy/index.php?/archives/141-SAS-Talks-You-listening.html
Chris