AFAIK: no.
But I don't have a Pebble yet (backed the Time Steel though), and aren't familiar with the code base of this app. But a couple of days ago I did some investigation, and it doesn't look like it should be that hard to get notifications working for the Time (Steel). So it's just a matter of having the time to implement it. After I've gotten mine I will probably try to give that a go. But as said, I don't have my Time Steel yet (hopefully will arrive in a couple of weeks), and it will probably also take some time to properly implement it.