http://pregnancy.baby-gaga.com/ is a site I came across thanks to their facebook application. Yes that's right you can share your 'what's happening this week' of your prgenancy directly to your facebook profile page so all your friends can be up to date on how things are progressing too.
The site itself offers a range of useful tools like a pregnancy calendar but it also has fun gadgets that you might want to check out too.
http://tickers.baby-gaga.com/pregnancy.php has a few to choose from including this one (set up for my own pregnancy):
A great resource for mums to be
