As a follow on to my previous message about building sensors around the MSP430 chip, I'm curious if anybody has a good resource for finding what paripheral/interface chips are available with an SPI interface. The MSP430 can be interfaced with lots of chips through other means, but using the SPI interface is easy and cheap and would allow me to make a "standard sensor" platform with variable interfacing/sensor options just by swapping out which chips are on the SPI bus.
Are there any stand-alone USB interface chips with an SPI interface? I know there are MP3 decoders, all-in-one Ethernet chips, and every kind of physical sensor you can imagine. I'm looking for a nice list of all of the different chips and where to buy them.
Thanks.