Got my Quick2Wire Raspberry Pi expansion connector and I2C port expander kit today. Came all the way from England, so shipping was almost as much as the kit. My only complaint so far is that the 26-wire expansion cable that plugs into the Pi at one end and the expansion connector on the other is only about 2 inches long. Another inch and it would easily reach the desktop when the Pi is in its case.
I haven’t started on the assembly yet, but it looks to be a straight-forward and easy build. Hopefully I’ll remember to take pictures as I work.