Ada Online

Penn State has a really cool Ada website which incorporates the annotations, fore- and afternotes, and additional supplementary information. One of my colleagues has been reading the book and emailed me the above link.

Disclaimer from the Penn State site:

You should use ADAonline only if you have already read Ada in book form. Otherwise you may spring surprises in the novel that you would be much better to learn in the way and in the order that Nabokov has prepared with such care and imagination.