I'm a mom of 3 and I just released a contraction timer app for the BlackBerry, BirthBerry. My app will time your contractions with just a click. Plus, you can send email/text message updates to your contacts about the progress of your labour. When your baby arrives, you can even send a birth announcement (with photo attached) to your contacts right from BirthBerry. Check out my website (in the signature below) to purchase it or try a demo.