What Atmel samples would you choose?

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cyclegadget:

JoeN:
My last two:

2 ATF1508ASV-15AU100 IC CPLD 128 MACRO 15NS 100TQFP
2 ATF1508AS-7AX100 IC CPLD 7NS 100TQFP

I have not configured them yet but I have an idea for two projects with CPLDs and I am going to use these.

Are those basically huge I/O expander chips?

Well, they could be. They are programmable logic with a complexity between older PAL/GAL and newer FPGA chips. So you can design them to be whatever you want, within some limitations, within a certain number of gates. If you wanted them to be shift registers they could certainly do that, or ALUs, or decode/encode logic. My idea is to make them counters that monitor one or more rotary encoders so the microcontroller does not have to and to have multiple channels. But I will probably not get to it for several weeks, I am busy finishing up several projects right now.