The operating system has bween talked about for months, with preview handsets creating quite a buzz in the early part of the year. But we're still waiting for the arrival of Windows Phone 7 Series handsets. That wait may not be much longer.Talking to TechRadar, Brandon Watson, Microsoft's director of developer experience for Windows Phone, claimed that the 'holiday season' was stil the aim for Microsoft, with developers getting test phones as early as July.When pushed about an exact date for phones. Watson said that the Windows Phone 7 release date would be 'between October and New Year' for countries outside of the US, which isn't long off at all. Indeed, once the iPhone 4 dust has settled, the build-up will probably start.Early preview models have shown 'live tiles' for individuals, offering one-stop updates of everything from social network updates to pictures and blog posts. The handsets will also have a direct button to Bing, which will offer location-based results. The handset will also offer zones (known as hubs) for People, Pictures and Games, the latter working with your Xbox Live games, while Music should push Zune into the mainstream in the UK.No real news on the specific phones as yet, although HTC is said to be creating at least one Windows Phone 7 Series handset.