I’ve managed to get OS X installed on the HP TouchSmart IQ507, however I’m still having serious issues getting it to boot fully. Seems to hang right before it gets to the IOACPI phase of the boot process.
There is good news though! I was able to get the touchscreen working under the OS X installer with very little work at all. Which bodes well for the full install, if I can ever get it to boot that is.
So if anyone has any thoughts on the IOACPI issue, let me know.