nit: Maybe it might also be helpful to link to the course page on Flow where the user added the notification, to help jog their memory and in case they want to read about the course one more time before deciding to enroll? So like:

> It looks like you're waiting for [CS 241](http://uwflow.com/course/cs241) - LEC 001 to open up.

Also, nit, a dash separating the course name from the section name makes it a little more readable IMO. We can do that in the toaster notifications too.