Passing certain parameters to Photonic with the gallery short-code you can make unauthenticated API calls on SmugMug to display the following:

You can also control various skinning aspects of how the thumbnails are displayed.

The gallery short-code has to be invoked with type='smugmug' to invoke the SmugMug functionality. Click on the links above to see examples. Note that you need to obtain an API key from SmugMug for this. The API Key has to be entered in Settings → Photonic → SmugMug → SmugMug Settings.