Incidentally, GiveLoop (one of DreamIt's graduates) looks like a great service. I would actually like to donate more money than I do, but I often don't precisely because this kind of transparency and feedback are typically absent.
Confusingly, "incidentally" isn't always used to describe an action as being incidental. Consider the following definition from a Google search of "define: incidentally":
Used when a person has something more to say, or is about to add a remark unconnected to the current subject; by the way
You're right, I guess it's not. I was thinking the story was more about there being a successful Philly-based incubator than the startups it graduated. Anyhoo, yeah. Cool-looking company.