AElflaed note: This was lifted from Cathyn's website so I could edit and preserve it. It might still be out there elsewhere as well.
Largesse is positively not rooted in monetary considerations. For many of us, we best display Largesse by sharing our time with others, teaching what we know, inviting others to our homes to allow them to use our tools to make armor or clothing or soap or what have you. We go to events and teach Arts and Sciences classes. We take hours and hours of our time volunteering to cook a meal for our local group's annual Harvest Feast. When we are in public or communicating in private we behave in accordance with the Virtues, being role-models for how members of the nobility (which we are all presumed to be) act towards each other. In short, we share of ourselves, our skills, our knowledge, our resources, to make our Society a better place, better dressed, better armed, better fed, better taught.
As a real world example, consider this. A candidate was being discussed in the circle in which I sit. This candidate was looked upon favorably, but the one knock against him was that his level of participation was a bit low, and he moved frequently due to being in the US Military. A speech regarding this candidate was given, pointing out that he attended every event and practice he could, within the restrictions placed upon him by his mundane occupation, and that this was a fine example of Largesse, in that he shared with us his company, his skills, and his knowledge to the full extent of his resources. Today I am proud to call this man my brother Knight.