I could care less how my blood is used. That it's going into a hospital and has the chance of being used to help someone is good enough for me. I prefer to not be thanked, as while it was my time and blood that I donated, I wasn't the person saving a life, it was the doctors, nurses, and supporting staff that were doing so. I just provided some of their materials.

I would also have absolutely zero interesting in meeting the person my blood went to. I have a hard enough time talking to the people at Qdoba, no less somebody who made use of my excess body fluids.

My proposition was for the blood bank's process. Their business is to collect supply, and attempt to maintain a constant output to their customers. With a little bit of data analysis and an email server, they could pretty easily connect people with their blood donation to establish in people's minds "Yes, my blood got used. What I did had a positive effect." rather than "Oh well, my blood probably got freezer burned. At least I got a cookie in return for feeling dizzy the rest of the day."