I have a app I am packaging for ubuntu.
I don't like the idea that if included in the ubuntu repositories I will have no control over updating that application. I don't want my users stuck on an out dated version for up to 6 months. I also do not want my users to have to manually add a PPA themselves to get updates as the target user will not have the technical know how to do this.
Is it OK to have my .deb add a PPA on install. So that I can roll out stable updates to my ubuntu users.
In short, yes. You can add a ppa with the deb (Google does something similar for example).