Yahoo! is apparently buying everything! But i agree its shouldn't always be about the number of people on a network but more about who, how and where. Quality users build true social communities that are addictive.
Hi, we agree with your post -but are more luke warm than many on Mobile Advertising. Love you picture by the way - we have used the same one for our new publication that launched 2 weeks ago. Its available now for free at: http://www.bkimedia.com/MAMA
...The 'where' is outside the US. So does Yahoo want to expand here? I think they just want a social network like everyone else.