Oberon is great! I remember reading the book, it gave me all sorts of ideas for Uxn. I love writing Pascal, Modula+Overon's drawing API is excellent. It's much too massive a system for me, and I can't even begin to imagine how I'd bring that over the GBA/Amiga/etc.. but I recommend people go through the book from time to time.
Yeah, the Oberon OS might be a bit much for your applications, eh? The chip is interesting as a target for a low-tech 32-bit platform. I've heard that the folks at Noisebridge (here in San Francisco) are playing around with making their own silicon ICs.
The "Provably Correct" book presents the work of Dr. Margaret Hamilton (she of Apollo 11, who coined the term "software engineer"). It shows a simple elegant way to make easy-to-use safe programming systems.
And "don't let the turkeys get you down". :)