Twitter will be launching official retweet buttons at the end of this week. The button will work just the same way as Tweetmeme buttons, users will be able to retweet an article from your blog and website and the button will also show the number of retweets.

The Google Adsense team has announced a revamped design for some Adsense units. This includes some major changes to the Leaderboard (728 X 90), large rectangle (336 X 280) and medium rectangular (300 X 250) units.

Facebook is going to change the tab width of all Facebook fan pages and applications from August23, 2010. The current maximum limit for tabs on fan pages and application pages is 760 px which will be reduced to 520 px.

So Firefox is going the Chrome way and planning to enable silent updates for Firefox4 users? This feature is not live yet for the latest version of Firefox but you may expect the addition anytime.

Google has just acquired another social application company named Slide, in an effort to “make Google services socially aware.”

Memonic is a brilliant website which lets you clip portions of a webpage and save the snippet in your account. You can save notes and other information directly from your email inbox.

Which Loads Faster is a nice website which lets you compare the loading time of two websites side by side. You can also test the loading times of a series of URL’s using this tool.

Photograbber lets you download all the images from a particular Tag. Using this free application, you can download tagged photos of yourself or that of your friends.

You can revert back to the older interface of Google Image search using this simple URL trick.

YouTube now allows users to embed videos using the new HTML5 embed code.

According to a security researcher, all versions of Windows Operating system contains a serious bug, which may result in critical vulnerability of your system.

Tweetmeme has announced a Pro feature for the Retweet buttons, these buttons will have extra features like hashtags, URL tracking and more

Yesterday, Facebook announced that now the world’s biggest social networking site has more than 500 million users. Guess what? The site now wants you to share your Facebook story with everyone else.

Welcome to Webby Wednesdays – a brief compilation of some web services which we found useful during the course of this week.

Yahoo is soon planning to embrace Bing and power a percentage of live Yahoo search using Microsoft’s search engine.