The notification system is live. You will receive a notification in the following events:
You can find the new envelope icon just besides the search icon
1) A user started following you
2) A user who you follow has uploaded a new hideout
3) A user has commented on 1 of your hideouts
4) A user who you follow has updated their hideout with a new version
Let me know if other notifications need to be added to the system :)