When you think you have to invent some fancy shmancy website to hit it big, just realize that the simplest ideas frequently are the best ideas.  The creators of the social networking site, www.bebo.com, who just sold bebo to AOL for a cool $750 million, have turned their attention to www.birthdayalarm.com.  I know, I know, it sounds so simple but is much harder than it looks.  But you’ll never know until you try.