Me mememememe meeeee! I do 365 anyway, this will be my fifth year.
But let's not do it on Facebook, please. Two reasons: Facebook has a nasty policy regarding photos you publish there- as long as they are on the site Facebook can use them however they please, wherever they please without asking your permission, and the photos are resized upon upload which causes drastic quality loss. Facebook is not a good place for photo sharing.
LJ is a pretty cool place, though your photos will still need to be hosted somewhere else, and I don't think you can make posts (not comments, actual posts) to a community without having an account. It's great for discussion, though, which is probably the main point here besides the photos.
Flickr is super good for photo sharing and getting exposure, and it has cool tools like geotagging, but it's only free for 200 photos. Afterwards you can still upload photos and links to all of them will be active if you post them on another site, but only the newest 200 photos will be visible on flickr's site. You can't comment without a flickr account, though(or yahoo, since flickr belongs to them), but even if it's not the place we host the actual group I recommend it to everyone for their photo storage needs.
Picasa is another photo storage and photo album site, I've heard good things about, but haven't played with so someone else might have to speak up about that.
Tumblr is very trendy right now, it seems to have developed into a more complex blogging platform than it used to be. I haven't used it, though, so I have no idea how it would work with multiple users.
Blogspot is a good place to blog, and you can have multiple people 'moderating' the same blog so they can post to it. I know you don't need an account to comment, but you would need one to post- but Blogspot is Google and many people have gmail which sorts that out. It would tie in to picasa as well since that belongs to Google too.
I guess it all depends on whether there will be one, two people moderating and managing the whole thing and taking care of uploading the photos, or if we want everyone to upload their own stuff.
In any case, count me in.