Mobile Internet usage is on the rise. Apple’s share of the mobile smartphone market is only going to increase. AT&T’s mobile data traffic has increased by 4,932% over the last three years. There will be over 1 billion “heavy mobile data users” by 2013.

These are just some of the stats that were shared with the audience at the Web 2.0 Summit today in San Francisco. Morgan Stanley analyst Mary Meeker led a speedy and high-charged presentation over Internet trends. The data and stats packed in her 68 page presentation is nothing short of mind-boggling.

The focus of her presentation this year (she gives this rapid-fire speech every year at Web 2.0) was on Mobile Internet and 8 key trends that Morgan Stanley has identified, including that social networking + mobile are driving big changes in communication and commerce.

KnowEmsmHaving a consistent social identity is becoming increasingly important for users and businesses that engage in online communication. After all, people can associate you or your personal brand with your username.

Fortunately, a number of services like Namechk and KnowEm exist so that you can check to see what services have your desired username available. Today, KnowEm is launching some new services to make searching and registering usernames that much easier, across social sites.

The basic KnowEm search service is free. You can search more than 330 social media networks for your desired username to see what’s out there and what has already been snatched up. If you don’t have an established brand name, this can also be an opportunity to evaluate the right name to use.

walkoffamestar-twitterCelebrities using Twitter is not a new phenomenon — it’s an increasingly common way for celebrities to promote new projects and connect with fans.

But how do celebrities use Twitter? What’s the following/followers ratio? What is the sentiment for tweets involving celebrities? Brian Solis (FutureWorks) and PeopleBrowsr analyzed this information in his Twitter Celebrity Report for August 2009.

Some highlights:

Apple is a company that doesn’t often jump bandwagons; they rather have everyone else jump on theirs. It is thus somewhat understandable that they don’t have an official Twitter account yet, except for the one that lists all the new iTunes Trailers.

However, as noticed by Tweetdeck founder Iain Dodsworth, Apple has recently added a couple of iTunes-related Twitter feeds, bringing the total number of their accounts to five. These are:

Twitter ErrorIf you’re one of the about 10% of Twitter users that protect your tweets, watch out, because anybody can read them with a simple Google search.

The security hole, first reported by The L.A. Times, reveals that, by just typing “site:twitter.com/*username*” (replacing *username* with the Twitter name of a protected account), you can see most or all of the tweets of an account. And it’s already being used to see the tweets of Bill Clinton, and others.

Apparently, while you can’t directly access a protected Twitter account, Google’s crawling bots can pass right by without any problem. By looking at the Google results, you can get a sense of what that person is tweeting about. For example, here’s what comes up when you search Bill Clinton: