Please support other calendar like PersianCalendar & HijriCalendar
This class exists in .net framework and this feature is not difficult.
Thanks for your attention.

A widget to show status updates from Facebook, Twitter and Google+ in one feed that one user has writen.

Badging allows community trusted values to be associated with anonymous users to determine their validity for Q&A and forums

integration for WebMatrix Helpers such as
http://blogs.msdn.com/b/erikreitan/archive/2010/07/12/webmatrix-helpers.aspx and
Razor syntax Helpers http://www.asp.net/webmatrix/tutorials/asp-net-web-pages-api-reference

create an orchard for runing on linus system servers

Link to content button on wysiwyg editor as per discussion here: http://orchard.codeplex.com/discussions/402220#post937834

Orchard should manage claims and be itself an ID repository, maybe adopting OAuth2 as its internal natural users ID management.
Some modules exist but they are old or not ideally integrated with internal user management.
Moreover, Orchard should be able to keep the information that this user id is related from this source of ID.

How about implementing SPA for the pages in Orchard.

In the same way that Modules can specify dependencies, Themes should be able to as well. That way any theme which uses Module specific code can just work out of the box and gives a configurable way to 'auto-enable' Modules