Want to be informed when someone updates their profile, or adds a photo, or does anything on Facebook? Well, soon you, and all the Facebook stalkers out there, will be able to do so with a new button called “Subscribe”. As you can see on the image above, it offers users to be pinged when ever those they subscribe to do something on Facebook. What do you think? Useful, or plain “Stalker button”?

Popularity: 1% [?]

Twitter is growing like crazy — in fact, it’s still one of the fastest growing sites on the web, despite being around for a few years. Now Twitter CEO Evan Williams has announced that they’ve surpassed 145 million users mark, and they’ve adding almost 300,000 users every day, which means they’ll be surpassing the 150 million mark very soon. He also mentioned that, quite surprisingly, 16% of new users are signing up via mobile devices.

Popularity: unranked [?]

Google has acquired Ångströ, which, despite its odd name, is a popular service for delivering search results on a person’s network — stuff that includes Facebook and LinkedIn.

Google is expected to integrate the new technology into its search engine. The acquisition price wasn’t disclosed.

Popularity: 4% [?]

Chatroulette, the random video chatting platform which took the world by storm earlier this year, is now down pending the release of a new version, according to its site. We’ll keep you posted as soon as we know more. Chatroulette launched late last year and is developed and run by 18-year old Russian developer Andrey Ternovskiy.

Popularity: 11% [?]

Twitter’s new “you both follow” feature has been in testing for a few weeks, and now it’s live and on every account. Basically, it shows the users you and the Twitter profile you’re visiting are both following.

We dunno how useful this really is, as you’re already following those folks.

Popularity: 5% [?]

According to rumors, or actually, according the the VP of Chinese game developer Handseeing Information Technology Co., Apple is in talks with the company and is reportedly offering $1 billion yuan, or $148 millions USD for it. Apple hasn’t revealed anything and never talks about potential acquisitions, so we’ll have to wait and see what happens.

Popularity: 5% [?]

DigitalBattle reports that Google has acquired casual game developer Slide for $190 million. This comes only weeks after Google invested $100 million into Zynga, makers of Farmville and other popular casual games.

Popularity: 4% [?]

Amazon has released a new Kindle ebook reader. The new reader will go on sale late-August and will be 21 percent smaller and 15 percent lighter than the previous model, while its screen will refresh 20 percent faster. A WiFi model will cost $140, while a WiFi + 3G model will cost $190. Internal storage has been increased to 4 GB as well.

Popularity: 4% [?]