BT is rebranding its BT Fon and BT Openzone WiFi services, bringing them together under a single new brand of ‘BT Wi-fi’.

The company is the Official Communications Services Partner of the London 2012 Olympic and Paralympic Games, managing half a million public hotspots across London including nine Olympic venues.

In this week's podcast we're talking about the forthcoming Windows Phone 8 mobile operating system, the UK launch of the Amazon Appstore and the GSMA's plans to make international roaming easier to understand.

There's also time to discuss new mobile tariffs from Virgin Media, cars that call for help after an accident, some mobile shopping research and LG's future as a tablet manufacturer.

HTC Corporation has announced a new certification programme called HTC Connect. It’ll enable consumer electronics companies to offer improved sound and visual connectivity between their equipment and HTC devices.

The first HTC Connect-certified products use DLNA connections, although the scheme is expected to include Bluetooth, NFC, wireless speakers and in-car systems in the future.

A new mobile app called Click A Taxi has launched in the UK and Ireland, promising coverage across all towns and cities. It’s already available in Denmark, Sweden and Norway.

The Click A Taxi app is available for iPhone and Android devices. Customers who book via the app are located by GPS; the nearest participating taxi company is then located and the app provides regular updates on the arrival time. There’s no charge for the app and no fee for booking a journey.

Microsoft has agreed to acquire business-focussed social network provider Yammer for $1.2 billion.

Yammer will become part of the Microsoft Office Division and will continue to report to current CEO David Sacks.