In the forward of my copy of Design of Everyday Things, the author points out that he could have used computers and mobile devices as but the examples he provides gave me a much deeper understanding of design. That being said, i still plan on buying the new edition because of the new chapters, brand new examples and ideas on implementation that may be more helpful to a dev-signer like yourself.
Other useful resources
http://robertlenne.com/requiredreading/
Universal Design Princples http://www.amazon.ca/Universal-Principles-Design-William-Lid...
Inspired: How to Create Products Customers Love (great for teams) http://www.amazon.ca/Inspired-Create-Products-Customers-Love...