Yes, this is definitely possible. You both need to create Notezilla.Net account from your computers. Right click on Notezilla icon and choose Sync. This will let you to create Notezilla.Net account.
Then, go to a sticky note, set a reminder to it and choose Send to->Contact and add receptient email address. (In your case your Boss email address) He will have to follow the same steps and add your email address.
Once you add the email addresses, click on the "Send" button to send the note. The receptient (your boss) will receive the note and also get reminded at the time you set. Also, if you want you can go to Notezilla.Net settings and enable email option. This way, he will also receive email at that time if he is not on his computer.
You can watch this short video that perfectly describes this feature:
Also, we have launched native phone apps so that he will get reminded even on phone.