Resources

Useful URL:
Nomi Desings: http://nomidesign.net
They have a lot of open source designs and pcb with some code examples.  Some neat arduino projects, arm and more
Adafruit: http://adafruit.com/
every one know adafruit but I thought I is worth a mention.  This is a similar site it has some projects again and a store you can buy project kits tutorial and lots more.  If you have never been you should go have a look

Literature:

Every one needs a good C programing book

Amazon.comAmazon.ca

C Programming Language (2nd Edition)

C Programming Language (2nd Edition)
STM32
data sheet: http://www.keil.com/dd/docs/datashts/st/stm32f10xxx.pdf
User ref: http://www.stm32challenge.com/sites/default/files/resource/UM01024.pdf
Other good tutorials:http://www.emcu.it/STM32.html#TUTORIAL_and_SW_examples

MSP430 resource and some good information in the other microcontroller section

http://www.43oh.com/forum

Others:
this site has all sorts of arduino projects and boards.  He sells lots of arduino kits too.  He is a local from where I live.  take a look
http://cal-eng.com/

An other robot invetor from my home town.  He has made lots of neat robots.  some automated RC Cars to line following robots and quadrocopters.  check it out!
http://www.maquinapensante.com/robots/Maquina_Pensante/Welcome.html