Sharing to multiple social networks in Windows 8 ?

In Windows Phone, if I want to post a link to all my connected accounts like FB, Twitter, LinkedIn etc, I just select share page from within IE and then select 'Social Networks' and then I'll be able to select all or any of these networks. But in Windows 8, I am not able to share to these accounts in one go, the charms bar allows me to share to only FB or Twitter not both in the same try. I have connected all my Live, FB, Twitter and LinkedIn accounts in the People App. And I don't want to install any 3rd party plugins for getting this nice feature that Windows Phone has. Also I miss the multiple inboxes in Windows 8, like its available in WP7, in Windows 8 every account goes inside the single Mail App, much to my dismay.