Hands on with the BlackBerry PlayBook The BlackBerry PlayBook is nearing its final build with fully working tablets on public show at Mobile World Congress and one stand representative going so far as to refer to a PlayBook as “my own”. All that’s left, we’re told, is battery optimisation – something that’s actively being worked on. At Mobile World Congress today RIM announced two new PlayBook models to add to the previously announced WiMax and Wi-Fi BlackBerry tablets....

Microsoft adds Facebook ‘likes’ to Bing search results Microsoft on Wednesday showed how Facebook friends will be able to influence Bing users’ search results, as part of a wide-ranging update on search that also included developments for its image, maps and mobile services. The new Facebook features are supposed to help Bing users find more useful and reliable search results. A person who searches for the name of a musician, for example, might see that a friend has already “liked” a particular fan page about that artist....

Wi-Fi networks are harmful to trees Radiation from Wi-Fi networks is harmful to trees, causing significant variations in growth, as well as bleeding and fissures in the bark, according to a recent study in the Netherlands. All deciduous trees in the Western world are affected, according to the study by a group of institutions, including the TU Delft University and Wageningen University. The city of Alphen aan den Rijn ordered the study five years ago after officials found unexplained abnormalities on trees that couldn’t be ascribed to a virus or bacterial infection....

Apple iMac 21.5in (Mid 2010) review Expert’s Rating Our Verdict For close-up daily work, we found the size and resolution of this 21.5in full-HD screen to be a comfortable fit. Designers and those looking for large-screen entertainment are better served by the 27in iMac. Formidable attention to detail in design and Construction puts the iMac clear of any imitators, while overall performance is plenty fast providing you don’t plan to try much gaming....

Zeus banking Trojan ‘could be used in espionage’ The Zeus banking Trojan could be a useful tool in corporate espionage, says one security researcher. Zeus typically steals online banking credentials and then uses that information to move money out of internet accounts. In the past year, however, Gary Warner, director of research in computer forensics with theUniversity of Alabama, who has been closely monitoring the various criminal groups that use Zeus, has seen some hackers also try to figure out what companies their victims work for....