To start a Knit-Along, just post a new topic to this forum, with your project description in the Subject. To join and participate in the Knit-Along, just reply to that same thread.
Ask questions about the pattern, share ideas, post progress pictures, etc! Have fun everyone!
Oh yes, and remember to respect copyright laws. Patterns and images can be linked to, but not entirely duplicated in the thread, unless they're yours or you have permission. Thanks!