So we have:

Potatoes - some for roasting (and some for salad on Boxing Day) and for mashing
Brussel Sprouts - like 'em or not
Carrots - for roasting
Parsnips - for roasting
Red cabbage - 'cos its pretty
Onions or shallots - to cook in the red cabbage and for your stuffing or nut roast
Peas - for me, because I love them and I'm not a parsnip person.
cranberries. I would then make sauce with them to go with my nut roast
celery - for the soup
broccoli
cauliflower
And Garden Happy's stuffed baked squash/pumpkin.

I'll add lettuce and tomatoes (to go with the smoked salmon).
And garlic - can't have stuffing with no garlic.
I'd use most of the above (except the squash/pumpkin and parsnips - still trying to get over childhood hatred).

This year, we will have stored red and yellow onions, and garlic. And I have some brocolli frozen which has Xmas Day marked on the bag! (only froze 9 portions in total, so wanted to make sure some was safe).

A plan for 2008 is definitely in order. (No greenhouse in my raw materials though - but willing to freeze).