I'm assuming that since swype is no longer a closed beta, its ok to post this. I was poking around XDA since my swype stopped working after a rom update and found a swype.apk that has a microphone button on it. Sorry if this is old news, but I've been wanting swype to have that microphone for a long time. It works great too. I could only find a themed version though.
All credit goes to the great devs over at XDA.
Not sure if it works on every device, but it def works on a droid running UD 8.0