Interesting Site: 43 things

I finally took a look at www.43things.com. I'm definitely a geek and like playing with the site. It has a nice interface and the idea of sharing goals is neat...but I wonder about sharing very personal information. (The same issue applies to this blog.) Most people are going to have no interest in what I post. Family, friends and co-workers may learn something new about me, but I'm not likely to share anything too personal. Are there other people out there nefarious ideas or just plain iritating spam.