Andrew Connell's book "Professional SharePoint 2007 Web Content Management Development: Building Publishing Sites with Office SharePoint Server 2007" is due out in June but you can preorder. Andrew let me preview the content as he was creating it and it's great! If you are doing WCM, you have to have this book.
Andrew also teaches this great course WCM401: Developing Publishing Sites with SharePoint Server 2007 WCM. If you can't be there in person, relax the course is also offered online.
Andrew is a major contributor to the community. Keep it up buddy!