Well my sister now knows that I'm bi. I was at work and got a text message from her saying that she saw it on my myspace. She asked me why I haven't told anyone and I told her because I am scared of the reactions I may get and having them find out on their own gives them time to sort through their feelings or ignore it if they choose to. Anyway, she told me she was happy for me and that if I needed anything that I could talk to her. Hooray! I'm lucky in that I've had nothing but good responses when people find out.
Aww, congratulations! Having a family member that accepts you can be the most uplifting and helpful experience.