I'm trying ski goggles this year for my eyes, but they're only really necessary below -20F and it hasn't got that low yet, but I like the styrofoam idea - that won't get cold either

As for pogies - the ones I've seen are made mostly in Alaska, mine are Dogwood design and fit over my mountain bike even with the extra bull bars [I don't know what they're called but the bars that stick up vertically from the crossbar (for going uphill?)] and they're pretty roomy, otherwise Apocalypse Design http://www.akgear.com/hats-mitts.html make them too. I've seen homemade pogies made out of hoods from jackets... My hands get way too hot in them above -5C/25F so be warned

The studded tyres I have work really well for ice but for snow the wide rim wheels are better as they give a bigger surface area (and are mostly good for fluffy new snow) - the problem with the bike paths is that the snow has been packed down and is incredibly bumpy, they now need to scrape rather than plow

Cycling with in the dark and snow with the northern lights flickering overhead is incredible - I love it