PPAs are great. Having a reliable way to get apps to your users, and a reliable way to update them there as well is a huge benefit for the Ubuntu platform.
To get to a PPA you can use Software Sources to add the PPA by using the Add button in the "Other Software" tab. But then how to actually install the app in the PPA?
Well, once again Michael Vogt comes through with a graphical way to manage software from PPAs, right in Software Center! Thanks again mvo for another awesome contribution to the Ubuntu Desktop.