I was looking around the internet and found out that 2 wire is the same as I2C, but I2C is a trade mark from Philips.
as mentioned in this forum link from AVR Freaks (correct me if i'm wrong)
So with a PCF8574P IO expander , I'm going to hook up 2 of the sensors mentioned above. Ill add more later if it works.
I'm using the basic stamp sx micro-controller module.
I found this on parallax from the nuts & volts I2C example
If the are other examples can you direct me to them? or have any recommendations?