Google launched their service named Sidewiki recently. Sidewiki is a part of Toolbar and will be into Google’s chrome web browser soon. We need to click on a button to activate this. A sidebar will appear on the left side of the current webpage. The user can therefore comment on a selected text or the whole page. We can share the URL through email, Facebook or Twitter. The users can embed videos to the site.

Fellow users can view and vote comments. These votes will produce a user ranking for each user. This ranking will determine where the comments will appear on the site. If the ranking is higher, the comments will appear in a higher rate. Their objective is to move the better material to top and to move the unsatisfactory stuffs to the bottom so that it will not be visible. Site owners have the freedom to mention first on any URL under their control. Google said that Sidewiki is totally different from the Searchwiki, which was launched last year. The votes and comments will not be aggregated.

The site named DotSpots, got launched last week and is quite similar to Sidewiki. Marissa Mayer, Google VP was impressed by Dotspots in their 2008 demonstration.  She said that it was an exceptionally beautiful hypothesis. She likes everything that pushes the web forth in that way. The question now is whether it can control spam, which plagued the site Searchwiki. The second serious concern is that how long can they put ads on this site? Hope that Google will find a solution to these questions quickly. Google will launch an API for developers to access the information and use it.