Finally convinced company to allow us to open source something, wanted stories

We have a .NET library that we use to quickly generate PDFs/Excel sheets. We asked if we could open source this and were pleasantly surprised when our executives agreed. Their one stipulation was to make sure that we had no liability for the software, which seems to be the case for every license available out there.

I was wondering if others had stories about their trial balloon open source project in a corporate environment. Are there any issues you ran into? Did unfulfilled feature requests actually tarnish the brand image? Which licenses did you settle on?

I'm not sure how much development we will do on it going forward, but we add features every now and then. Since this is the .NET world, I suppose we should look into getting it onto NuGet as well. Just wanted to know of the results of others who had started their company foray into open sourcing internal software.