Frank, great work.
No luck for me here with the .config file
Pi boots, but no sign of /dev/i2c entries.
Did you install it with all modules to the right place? I've used this manual:
What says "dmesg"? There should be these two lines:
i2c-gpio i2c-gpio.0: using pins 0 (SDA) and 1 (SCL)
i2c-gpio i2c-gpio.1: using pins 2 (SDA) and 3 (SCL)
Do you use the Debian image? Maybe some other images don't use udev, which would mean that you have to create the device nodes yourself:
mknod /dev/i2c-0 c 89 0
mknod /dev/i2c-1 c 89 1
This is my kernel: