Hi Jason,
I was able to go to PowerPoint's Insert menu and select Object and attach from file and browse to an InfoPath XSN and attach it.
After attaching, I can double click the XSN and fill it out. Caveat: I'm using MS Office 2013, but it should be the same functionality on 2007 since this has not changed recently.
Make sure the InfoPath form template's security is set to restricted mode so you can double click and open.
Good luck,
Patrick