Ada: The Enchantress of Numbers - http://www.well.com/user/adatoole/ Comments on her, and her work, from a selection of people and publications in the field.
Tools For Thought: The First Programmer Was a Lady - http://www.rheingold.com/texts/tft/2.html By Howard Rheingold. Online copy of well known 1985 book on the invention of modern computing; this chapter on Lady Ada Lovelace, Charles Babbage, Difference and Analytical Engines. Newer (c)2000 edition of the book is out, with follow-up interviews.