GoForSmoke:
There are parallel to serial shift registers. You can read a whole line of bits from the pins on chained shift registers (1 CS on the master to CS chip 1 chains to CS chip 2, etc) as SPI serial at 2 MHz. But, hardware SPI may use pins that 1-wire does so maybe use soft-SPI and 1 MHz speed.
The 1-wire stuff is only in software already, so you can pick any pin you want for it.
(gasperinn) That's cool on the 22 connected. How long is the bus physically?