I developed a Midlet PokerClock. PokerClock allows you to keep track of blind levels when hosting a Poker Tournament. You can

• define small and big blind and
• set the time for each level

It counts down the time for each level and plays a sound when changing into a new level.

Give it a try: http://www.getjar.com/products/9347/PokerClock (download it directly from your mobile)