I have an A600 case if that counts. :-)
I've been looking for a tiny, modern motherboard to put in it, but I have yet to find anything that will fit. I wanted to put an Efika in it, but I think it may be too big. A Pico ITX board should fit, but they're pretty expensive for what's essentially a project that I'm only doing because it would be cool.
I expect I'll find something eventually. Heh, I'll probably end up using an A600 board at this rate!