I'd love to hear from anyone running pd under uCLinux (or anything, really) on STM32F4. My ultimate target is a custom board, but the probable initial development platform is Emcraft SOM. Thanks!

hmmm....No one has replied. Does this mean I'm SOL?

@GaryInThailand maybe you can try to hit the pd mailing-list:
http://lists.puredata.info/listinfo/pd-list

Cheers~