Lync 2013 for iPhone and iPad are available in the app store now:

iPhone: https://itunes.apple.com/us/app/microsoft-lync-2013-for-iphone/id605841731?mt=8

iPad: https://itunes.apple.com/us/app/microsoft-lync-2013-for-ipad/id605608899?mt=8

Lync 2013 for Windows Phone 8 is available in the marketplace now:

http://www.windowsphone.com/en-US/store/app/lync-2013/d85d8a57-0f61-4ff3-a0f4-444e131d8491

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