Are you missing an app in your Nokia N9? Or a functionality that an installable app could cover? two threads (here and here) have been opened by qgil as an attempt to highlight applications that are missing in the Nokia Store, in order to bring the attention of developers of those apps or alternatives.
Use the following example to add apps or comments: App linked to store - Shortest description.
Why you miss this app. Is it for a feature that other apps could provide? Is it a specific brand or service you are after?
Other people is encouraged to add more arguments.
If the app is not available in the Nokia Store you can link it to another catalog e.g. Windows Phone marketplace.
Hope my prayers for Nokia play to, shazam and whatsapp may be answered :)