Here are some audio talks on the topic of dana/generosity:

Paramis Series #1 Dana: The Joy Of Sharing – a talk by Myoshin Kelly

Generosity – a talk by Gil Fronsdal

And some readings on generosity:

Generosity by Gil Fronsdal, from The Issue at Hand
Practicing the Dhamma in Ordinary Life by Yogavacara Rahula
Generosity Quotes from Gil Fronsdal’s Dharma Practice Day on Generosity

Generosity: dana,caga from Access to Insight

Dana: The Practice of Giving – selected essays edited by Bhikkhu Bodhi