Today's Tech: Skype arrives with BlackBerry Q10, Yahoo sees senior shake-up, Sony and BBC to bring Wimbledon in 4K

Popular VoIP service Skype has finally released an app for BlackBerry 10 – just in time for the release of the BlackBerry Q10 smartphone, which is now available in the UK exclusively from iconic Oxford Street retailer Selfridges. In fact, as the new Skype app requires BlackBerry version 10.1 to run, it will only be available on the QWERTY-sporting handset for the time being - full-touchscreen stablemate the BlackBerry Z10 is still waiting on the incremental update. Microsoft-owned Skype said that the Z10 would get the necessary boost "in the near future" and added that more "big name applications" are on the way to BB10.

Fred Amoroso, the Chairman of Yahoo's Board of Directors, has resigned his position and will not seek re-election, the erstwhile Internet giant has confirmed in a statement. Silicon Valley veteran Maynard Webb will take the reins as interm chairman. Prior to joining Yahoo, he served as COO of eBay and CEO of LiveOps. He also currently sits on the board of Salesforce.com. However, industry insiders say Webb is unlikely to be a permanent fixture and company CEO Marissa Mayer may well use the opportunity to consolidate her power. In public, the separation is going down amicably, with Amoroso talking up the progress Yahoo has made in the past year and paying tribute to Mayer's stewardship. Read on for more on the latest moving and shaking in the upper echelons of the tech world.

Sony and the BBC are set to partner up this summer to trial 4K television broadcasting at the annual Wimbledon Championships tennis tournament. Sources inside the two companies have confirmed that Sony will deploy a fleet of its outside broadcasting trucks and the camera equipment necessary to film and potentially serve up footage of Andy Murray and pals in Ultra HD (UHD). "We're trialing 4K at Wimbledon this year. We're really excited about 4K, it's definitely something the public are going to love so we're keen to start rolling it out as soon as possible," the anonymous source told TechRadar. The mystery informant added, "When you look at it, you feel something, like the jump from SD to HD, it's amazing. Wimbledon is going to look better than ever."

More from Sony, and the company has raised a number of key financial forecasts for the fiscal year to March 2013, ahead of releasing a full earnings report on 9 May. The Japanese consumer electronics giant now anticipates it will report net income of 40 billion yen (£262m), double its previous forecast of 20 billion yen (£131m). Sony also upped its operating-profit outlook to 230 billion yen (£1.5bn) from 130 billion yen (£852m), and bumped up sales estimates to 6.8 trillion yen (£44.7bn) from 6.6 trillion yen (£43.3bn). Financial pundits are attributing the improved outlook to the effects of a weaker Japanese yen and the extra income generated through asset sales - follow the link for the full story behind the firm's remarkable resurgence.