I just joined because I saw this post, it may be useful to avoid the agony of researching every bit of hardware we buy, by posting up the Mac OS X compatible stuff we use.
I'm running a small apple network at home, a Titanium powerbook, a dual G4, and a G3 (as a print server and slave). It's wireless via a belkin wireless router, the G3 has a belkin wireless usb device, I tried a netgear device, but they don't support Mac, and as I've said on many forums, can burn in hell. helll. hell. I'm getting ADSL, and I've had confirmation from D-Link, and Billion that their wireless router/modems will support Mac (they should because they're configured via a web interface).
Re: the i386, honestly I don't think Mac would ever sanction tri-booting, the whole point of apple is that the OS is built to run on apple hardware, which is what makes it so stable. A cracked version, sure (rumour has it it's already downloadable), but then again it cracked and not sanctioned by apple. Apple apparently has hired the Sony Viao guys to work on the new hardware.