I'm not sure if there was a spotpass notification, but on the estore you can't miss the update: the message is the 1st thing you see before you can access the store. Actually there was a video app update first, I wonder what it does (boot faster?)Best practices for patching:
1) Toggleable automatic downloading of patches
2) Prompting user on software launch or close that a patch is available
3) Allowing the user to manually check for patches