Actually I have three PCs and three Macs all networked together at home and they all speak to each other quite sweetly. A bit fiddly to set up but once done it's no real issue.
Outlay is a bit of a pain, and I've had to buy 'duplicates' of some programs (eg Nero for burning in Windows, Toast for Mac etc) but having a dedicated Mac system for video editing with Final Cut Studio is a dream compared to all the problems I had with my Windows post prod.
Hey, Nick. I'd be paranoid about attaching drives to both systems. As soon as it hits the Mac, it would instantly become infected with those !$%&%& .DS_Store files. ![]()