Coming to DjangoCon EU in Cardiff, Wales later this month? You can order a copy of Hello Web App and get it at registration, saving ~$12 USD on international shipping! I'm also donating a portion of the sales to DjangoCon's diversity fund.
Click here to order a copy for US$19.95 (£13.50) to be picked up at DjangoCon registration.
I'll also be running a workshop at DjangoCon on the Open Day called Django for Designers based on the Hello Web App content. If you're at DjangoCon, come say hi, would love to meet you!