When Facebook announced its new messaging service yesterday, you had to listen closely if you wanted to hear what social network founder Mark Zuckerberg said about brands. He mentioned that 350 million of Facebook's 500 million members use its messaging system (spanning the site's email, instant messaging, and text messaging) and that there are 4 billion messages sent daily. As a footnote, he said that doesn't include messages brands share, such as through status updates and notifications. That was it.

Let's all just stop for a minute and realize something: Everyone doesn't want to share everything. Maybe you're saying right now, "Hey, lady, I already knew that." But stop for a minute, and ask yourself how many social media products and companies are built on the premise that everyone does want to share everything. If you've ever read any of my posts about Foursquare, you know this is an issue I circle back to, a lot. The reason I am covering the topic again this week is Rockmelt, the so-called Facebook browser that lets you merrily traipse across the Internet …

Throughout Friday, the comments kept piling up on my Facebook photos: Sister: Dave...what is going on over there?? Friend:Huh? And so they continued. It was all in response to my day of testing out Microsoft's Xbox Kinect, the controller-free console gaming system that's designed not just to get players off the couch, but to put their whole bodies in the game. And one of the biggest surprises about Kinect is how well it includes social media as part of the experience.

I never would've anticipated that I'd write about MySpace two weeks in a row. But I'm not writing about it so often because there's good news to share. Or because I've started going there. That light at the end of the tunnel, which some may have wanted to see with last week's redesign, is actually looking more like a freight train that may finally run over what once was the preeminent social networking site.

It's getting clearer by the day that mobile marketers can learn a lot from social marketers. This never struck me as much as it did last week while watching OMMA Mobile's keynote speaker, Andy Graham, who leads mobile strategy at Adidas. On occasion I worry that I embody the adage that when you just have a hammer, everything looks like a nail. I am coming from the vantage point of someone responsible for both social media and mobile marketing strategy, so it's natural that some similarities will stand out. With Graham's presentation though, while he was talking entirely about mobile, …

Fashion victim, fashionista: these are words not easily applied to me. However, I have learned one valuable lesson over the years by observing an industry that's always on the lookout for the next big thing: if you wait long enough, past trends and patterns will make a comeback. This is exactly to the case with social media right now. As all things social start to mature, the same evolution that took place in the digital marketing industry only a few years ago is emerging: social is fast becoming less about experimentation, and more about regular production.

I hope you agree that every now and then, it's actually time to revisit MySpace, the site about which Gawker said earlier this week: "MySpace shares user data with advertisers, too, if anyone cares."

Where were you the morning of Thursday, October 21, 2010? I happened to be in a series of meetings. Yet if you were walking down a certain street in Singapore, you would have seen my face projected on to the side of a building, clearly visible in the night given the 12-hour time difference. Much to my relief, this caused no major panic in the region; the Singapore Exchange Limited opened 10 points higher Friday morning (yes, I checked). I sadly missed the moment, choosing the wrong time to pay attention to my colleagues and thus missing the video feed.

I know, I know. A lot of us rolled our eyes earlier this week when The Wall Street Journal breathlessly announced that its exclusive investigation had revealed another Facebook privacy breach, this one about personally identifiable information leaking out while no one was looking via the social net's third-party apps.

How do you share insights from nine panelists spending 50 minutes discussing what works with social media? You don't. But given that I was one of the nine, I can at least share one person's perspectives, including answers to questions that weren't even asked.