Help with MAX6957

hey all

i just stumbled upon some MAX6957s (http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3365)

and have been trying to discover how i can interface with the chip to provide additional digital outputs

it's a serial-interfaced LED Driver but can also double as an I/O expander

has anyone had any success with doing an SPI interface with this or a similar chip