Mike,
Thanks for getting back to me so quickly. I thought I'd get an email and never checked back until now.
I appreciate all of your ideas. Very helpful.
The purpose of trying this was to a) avoid too many features in a Note as the geoprocessing service could return hundreds of features and b) have better symbology options (e.g. transparency).
So, since, as you suggest, #2 seemed to be my only option at the moment, I just created an add-in that represents returned features as one entity with many graphics that the user can move through using a datagridview. Then, the user can add the features to the map content as a Note, but at least the user is deciding if they want to manage the information that way.
Looks like I may have better options with 10. And I doubt I�??ve fully explored the new Analysis Gallery functions.
Anyway, thanks again.
Mary Ellen