I just noticed a new product that Philips has introduced:  A Parallel
bus I2C controller
http://www.semiconductors.philips.com/pip/PCA9564.html
I can see how it would be really easy to turn this thing into an SPI-I2C
controller with only a few shift registers.
Comes in SO-20 so it's moderately easy to mount.

--Brendan

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