Searching for Android apps by permissions, features and intents

Are there services out there that let the user search or browse an Android app market by specifying the app's permissions (e.g. android.permission.RECORD_AUDIO), features (e.g. android.hardware.microphone), launched or filtered intents (e.g. android.speech.action.RECOGNIZE_SPEECH)?

I am interested in locating 3rd party apps that could complement my app in the Android environment so that I could recommend such apps to my users, ideally programmatically. What I've used so far is Google Code Search queries such as http://www.google.com/codesearch?q=RECOGNIZE_SPEECH, but these cover only open source apps. Is there a better way?

Update: note that Google Code Search has meanwhile been shut down. Sad. It was a really useful service.