There is no 104-pin CSK connector on Rev B Dev Boards.
Rev B and Test Board B (which is the "fix" for the SD card interface for Rev B) are all 80-pin.
Rev C and later are 104 pin.
Assuming Ivan's radio has the I2C isolator, then all contiguous modules that have 104-pn CSK connectors will have SCL_SYS and SDA_SYS as long as Ivan's radio is plugged into that stack.
IOW, one module carries P3.1 & P3.3 (on the 80- and 104-pin CSK bus) to SCL_SYS and SDA_SYS (only on the 104-pin CSK bus). In your case, it's Ivan's radio that does this.
1) All I2C slaves are interconnected via SCL_SYS and SDA_SYS. The MSP430 Master (P3.1 and P3.3) is connected to SCL_SYS and SDA_SYS via the isolator. If you were to do other I2C Masters, they would connect directly to SCL_SYS and SDA_SYS.
2) Yes. Assuming the isolator on Ivan's board works correctly.
[This message has been edited by aek (edited March 03, 2008).]