If you are a fan of the What to Expect series of pregnancy books, take a look at its companion website.  I just happened across it and it is really useful.  Helpful interactive tools, charts and planners to get you through your pregnancy.  Features include:

• Weight Gain Tracker: Monitor pounds week-by-week with an interactive graph
• Birth Plan: Map out how you'd like your labor and delivery to go
• Baby Name Finder: database of more than 5,000 names.
• Buying for Baby: Figure out what you need to buy — and what you can borrow.
• Who to Call When the Baby is Born: Organize phone numbers and e-mail addresses
• Birth Announcement: Share your news with friends and family by creating e-mail cards. 

Additional section on Preconception and The First Year.  Free registration required.