Re: milk donation
there are lots of milk banks, most of which are for-profit (owned by Prolacta). there is also the network of HMBANA milk banks, which are not-for-profit and provide milk products for NICUs. both of these sets want large donations (100-oz lumps) and require screening prior to pumping, as far as i know.
there are also informal milk sharing mechanisms, where you can directly give your milk to another mom/child in need. most popularly these are HM4HM (human milk for human babies) and Eats on Feet, both of which have extensive local facebook presence. generally they ask folks to engage in responsible private exchanges, which would involve conversations between donor and recipient about donor's health status, diet, medications, age of baby at time milk was pumped, age of milk, storage conditions, and logistics of transferring milk (usually recipient will pick up, or pay for shipping, and often recipient will replace bags), and sometimes donors also want to know something about the recipient's baby/why they need donor milk.
Nursing, pumping, cloth-diapering, babywearing, working professor mama with the awesomest SAHD ever.