Jay is right, scroll all the way down any ATP page and squint near the middle-bottom of the page
Here is the link to the searchable Memberlist, for example if you wnat to add it to your own customizable menu bar
http://garden.org/users/member...
To create a custom menu bar,:
Click on Your Profile, the head-silhouette in the upper left)
ยป Change your site preferences
Custom Menubar - - - - Manage your custom menubar
add stuff
Save Your Changes