If you want to see who has signed up (expressed an interest) for a specific activity but has yet to be assigned to it, you can run a search:
Go to any option that requires a search (i.e. Communicate >> Send Email; People >> Search, etc.)
In the “Module and Status, Communication and Group Filters” sections, choose who you would like to include in the search
Click the [Add Search Criteria] button
Search Type: Select “Activity” [this is the first part of the search]
You can select “Activity Category” if you wish to include multiple Activities from a category
Schedule Status: check the “Signed Up” box
Scroll down to the “For the following activities” section and select the desired Activity
“In the selected category(ies)” if “Activity Category” was chosen
Click the [Add] button
Search Type: “Activity” [this is the second part of the search]
You can select “Activity Category” if you wish to include multiple Activities from a category
Schedule Status: Check the “Not Assigned” box
Scroll down to the “For the following activities” section and select the desired Activity (i.e. the one you chose above)
“In the selected category(ies)” if “Activity Category” was chosen
Click the [Add] button to add additional options to your search, or click the [Add and Go] button to run your search
