I have been on the search for KD materials for our guy and found very, very little. The few materials that I did find are geared more towards gay men, but they are written from the male experience perspective so they may be of some help. I have an electronic copy of the Berg article, so PM me if you would like a copy and I can get it for you.
1. "The Gift of Conception" by Andrew Berg. It was published in the Jan-Feb 2000 (col 3, no 1) issue of Alternative Family. Two page article written by a known donor that has 2 (possibly more now) children with a lesbian couple. He has, from the sound of the article, only minimal involvement in their lives. The article really focuses on the emotional impact of being a known donor.
2. Children, Lesbians, and Men: Men as known and anonymous sperm donors by Geoff Lobenstine
This book was recommended by the AI office at my clinic. It is published by the Men's Resource Center in Amherst, MA and is a collection of personal stories from known and anon donors. The only way to get a copy is to make a $10 donation to the center through their website (
www.mrcforchange.org) and designate that you would like a copy mailed to you. I did order a copy and would recommend it as a great resource if your known donor is looking for a "in his voice" type resource. One note is that the booklet was written over 10 years ago, so the voice is very much centered in what was happening at that point and does not contemplate civil union/marriage issues, gender identity discussions, second parent adoption or other similar and more current topics. Oh and anonymous sperm donors in the title means sperm through a personal intermediary, not a sperm bank.
Hope those are helpful!