All of Google's strategic initiatives this year are about mobile, the company's CEO, Eric Schmidt, wrote in a guest article for the Harvard Business Review titled Preparing for the Big Mobile Revolution.

Mobile social-networking company GyPSii has released an upgraded version of its Tweetsii application for the iPhone, and also added a version for Android, it said on Wednesday.

Twitter knows where you are -- at least in the U.S.

Twitter users can now add their current location to their tweets. The micro-blogging service on Thursday activated an optional new feature that appends geographical information to your posts.

Twitter has enhanced geolocation services provided on its messaging service by buying Mixer Labs, the company said on Wednesday.

Twitter is now allowing its externally built applications to provide geolocation features to end-users, after announcing its intention to do so in August.

The latest version of Google's Picasa photo-management software adds face-recognition features and simplifies geotagging, the company announced Tuesday.

Users of Android-based phones now have access to social-networking site GyPSii, which focuses on location-centric services.

Facebook wants to know "What's on your mind?" Twitter asks "What's happening?" But that's getting old already. The burning question for the next wave of social networking is "Where are you?"--and services like Foursquare, Gowalla, Brightkite, and Loopt want you to use your smartphone to answer it.

Twitter's upcoming geolocation feature is a nifty idea -- but mainly in theory. A quick look at the applications of Twitter geolocation could give those close to you, and not only those people, some ideas of taking advantage of the service to your detriment.

Twitter gets even better with the introduction of a new opt-in geolocation feature that will allow you to identify where you are tweeting from. Attaching your location to a tweet is nothing new to smartphone owners, but having the location-aware feature baked into Twitter opens the floodgates to hosts of cool new Twitter tricks.

I went on vacation recently, and during that time I realized how dependent I have become on GPS applications to find what I am looking for. GPS devices maximise my vacation time by letting me drive less, since by using them, I never get lost. And driving less means I'm living a greener life, too.