I take a little time off from riding in the winter. Yeah, it's great to ride all year long but it's good to mix things up so you don't get burnt. The first rides in Spring mean a little more. Besides, fitness wise, I'm pretty aweful all year long so that doesn't matter. I'm actually more concerned about the skill level dropping too much.
Outside Ice Hockey - Once it gets cold, outdoor ice hockey starts up and that's about 2 nights a week and a good and fun workout as well. Real good lung and leg workout not to mention it keeps the reflexes sharp.
Snowboardig - For snowboarding, last season I got just shy of 20 days at the hill which is good considering I have 3 small kids. I'd like to get at least 10 in this season. Like Madness said, I just got the new Rome and MackDawg flicks and was pretty stoked to ride snow after watching them.
Bikes - Planning to get out to Ray's (maybe even 2). Allaire and Hartshorne should be fine to ride all winter long and they are both pretty close - I'll hit them when I have a chance and trail conditions are good. I will be in FL a couple times over the winter and will try and sample the trails when I'm down there too.