Microsoft.Xna.Framework.Media.MediaPlayer.Queue.Activesong populates the .Artist property for music *streamed* from Zune, but not the .Name property, so devs can't know what song is playing. Marketplace policy requires music apps to populate both properties, so Zune should do this, too.

This will benefit for applications which create audio, or recording voice, it will be easy and unified way to export audio files instead of create extra server program.

When the phone is locked (i.e. usually in my pocket, give users the option to disable 3G and just use edge for notifications etc.) Once the phone is unlocked and being used, 3G re-enables in the background for web browsing etc unless a Wi-Fi network is active. I'm sure that this would take normal day to day battery life well over the 10 hours or so that most people need.

We can access exif info (limited) using a Picture object when dealing with Media library. But if we try to save an Image within app inside Media library or some Isolated storage we can't prserve exif info of that image. A better manipulation of exif APIs will be very helpfull. Read the given link for more details: http://forums.create.msdn.com/forums/p/84673/510718.aspx#510718

If the application in the background，Toast push notification can resuming the app,not restart the app.

The phone currently plays a large selection of media formats (MP4, M4V, 3GP etc) that aren't supported in the emulator. This makes apps that use these formats extremely hard to debug.

Would be awesome if you could fix this :)

In the call log, we can see multiple entries for the same contact. Instead, just show the latest activity.
And show the previous entries, when clicked on the latest entry!!

In my humble opinion, the Windows Phone is the best gaming phone on the market today. The connection with XNA and Xbox are limitless. I would love to see a Windows Phone that had real controls. If Microsoft or one of the manufacturers created a phone like that, it would make the experience even more awesome! Apple made a mistake of blocking any type of gamepad control for their phone. I would love to see Microsoft follow the path of Xperia Play and embrace this type of phone!

It is late and I have forgotten to load the battery of my thirsty Windows Phone. I plug it into the power outlet and THEN it plays this stupid sound, my wife wakes up and I am mad about it. I then have to mute the sound every time I have to load the phone. Of course I sometimes forget to crank up the loudness afterwards so I will not hear the morning alarm. So please make it possible to disable the sound played when the WP7 is connected to the power outlet.

If you activate a pin for the phone Kids Corner automatically gets a pin too. This means that you as a parent have to unlock the phone for your child. (Or give them the pin which kind of defeats the purpose.)

Feature suggestion: I would like to be able to set "no pin" in the settings for Kids Corner. Additional feature option would be to specify a different pin for Kids Corner (1234) :)

It makes no sense to have a pin for Kids Corner if you have, say, only configured a few games in that area for your child!

Viber is an extremely popular application similar to Tango, but better in some ways.
It has more users -> more people to call.
The application is built into your contact list (no application to open).
You can text people using Viber.

Here is the info thats available on the Website of Viber:
Viber is an application for free international calls and text messages to other Viber users using 3G or Wi-Fi. Uses your existing contact list - check out which of your phone contacts and friends is already on Viber so that you can call and text them for free.

Give ability to create games that have access for xbox live achievements. It doesn't have to be full access. Still only partners can have a "Xbox live" mark on their game icon, but having a one place for achievements, leader boards and friends would be great (WP7 Live?)

My company likes WP7, but the nonexistence of visual voice-mail is stopping a switch from the iPhone. Is there a way to access voice-mail metadata?

Socket APIs and duplex WCF communication