It's still pretty active, not as active as it used to be and a lot of the older members seem to be not around anymore. I'm sure it will pick up though the closer we get to the next gen systems at the end of the year.
I'm going to reply to a message that's over a year old because I'm such a top bloke!
I'm not sure why people enjoy it more. It has its share of great features and you can do a lot with it when connecting it to the PS Vita but, I prefer the Xbox more for its layout, Xbox LIVE, the games and the community (unless you're playing CoD and then you get the worst the world has to offer).