I went to Iowa City this past weekend, and in addition to being part of a massive gold stripe, I paid a visit to the university archives to have a look at my birth mom's graduating class.
Fortunately for me, electrical engineering was not a popular major for women in the early 80s, so I was able to narrow down my list of candidates to ten people. From there, I applied a little Internet detectivery and was able to find one member of the class who appears to match up well with the information I have.
This candidate is an electrical engineer with brown hair and eyes, who worked in satellite communications for many years, is from southern Iowa, and enjoys cycling. She now lives in Louisiana, works as an Internet systems designer, and, oddly enough, is associated with the Big Easy Rollergirls. I guess it might run in the blood…
I'll try contacting her in the next week or so and ask her for help finding my birth mom - I don't want to go right out and accuse her of being my mom.