Mango supress the 'next page' link in IE menu. That's inconvenient when we press the back button accidentally or by error.

support more payment methods !

My corporation's WIFI SSID is not broadcast--as is not uncommon practice. Being unable to enter that SSID prevents me from using my WP7 phone as a corporate device.

The voice to text feature on WP8 seems incredible, but the option to use it is rarely presented. It would be nice, as with android, that the voice to text feature be a button on the keyboard and thus always available. This would be especially nice when in the car.

Provide a viewer for viewing office documents (e.g. word, excel and powerpoint basically). The UIWebView in iPhone support serveral formats and give a very good user experiences in some content related apps

We need High Performance Page Transition Effects support !!!

Please allow the access to phone filesystem. It would be a great benefit if the developers can manipulate the sdcard resources etc etc.
I know that storage and storing information is limited to the application context. I'm android developer, I've been through interoperability guide and read about this. I've been wondering if something can be done through the silverlight, but all that failed since read that.

Cheers,

usb or wifi sync with no 3rd party, cloud hoops to jump through.

When you unplug a WP device from your computer while debugging, you get an error message that the device on an IP address and port is no longer responding. If the debugger connects to the phone via IP, then why not allow for debugging over the local network? That way, someone can develop for Windows Phone in a Hyper-V VM, and still debug on a physical phone, just without plugging it in. There ought to be a way to build a Debug Agent app that can broadcast itself to the network so Visual Studio knows where to look.

Increase webbrowser control
function

simple. let there be more than 9.

A user should be able to deside between power drain and functions.

The concept explains itself well in below blogpost:

WinRT Transitions – Creating Fast and Fluid Metro UIs

http://www.scottlogic.co.uk/blog/colin/2011/10/winrt-transitions-creating-fast-and-fluid-metro-uis/

This enables caching of and usage of offline maps

We need an api to allow the user to sync any file from the desktop to the isolated storage of the app.

In Mango I do not see a way to subscribe to a podcast by entering in the URL. There should be a way to do this. I am liking the new download over WiFi feature.

Please, add "never" in lockscreen timeout when the Phone is connected to PC, but I'm not debugging my app (I.E. I'm writing code)