The procedure is simple:
1) Find snippets from your WIPs in the Alice fandom: it can be crossovers, fusions, what have you, as long as it involves either the characters or world of Alice, you're set.
2) Post one snippet per comment: naturally, you can post more than one comment.
3) Check out other people's comments! Let them know when you see part of a story that sounds interesting, or if you're looking forwards to seeing the story completed.