Head on over to the O'Reilly Network Safari Bookshelf and you can see some excerpts from the wxWidgets book. I especially like Appendix F. Too bad the screenshot doesn't have the new icons. Grr.
The publisher's web site now lists tomorrow, July 20, as the publication date, so I think that means we should be seeing the book in stores and available online very soon!
Congrats, Kevin! That's awesome. :) I didn't realize Audacity used wxWidgets. Nice screen of BW in OSX, too!