Honestly, I think you're both right. My feeling is that Apple has not successfully been able to from that successful web platforms have are professional, but "o

Honestly, I think you're both right. My feeling is that Apple has not successfully been able to from that successful web platforms have are professional, but "open-ended with a purpose". Your examples of Facebook and Stack Overflow are perfect representations of this: both are professionally implemented, but the content itself is basically open, but purposed. Ping doesn't let you generate anything new, or provide information that is broadly useful.