We know that since the release of Windows Phone 7, many people have been asking for built-in Windows Live Messenger support, given that the “official” partner-built Messenger by Miyowa app had been lackluster is both features and integration with the People hub.

Well it seems like Microsoft has heard your voices. In a Windows Phone 7 developer communication newsletter sent out today, they have let slip of a few details which might hint that a built-in Windows Live Messenger app is in the works and coming as part of the “Mango” update:

[The Windows Phone 7 update] will bring support for real time communication and messaging and a broader connectivity to SkyDrive.

With additional APIs (such as sockets access) being made available in Windows Phone “Mango”, a proper built-in Windows Live Messenger app is definitely not surprising. In fact, we’ve even heard rumors before saying that Windows Phones will be getting video calling and Facebook chat support, let’s hope that these features will also be coming as part of this built-in Messenger app as well!

(Thanks to Neowin.net for the heads up)