hey i found this app today it basically does the same as ms voice command except it only reads sms, possibly e-mail but i havent received one since i intstalled the app.
here is the website.
"TellMeText requires priviliged access to your device in order to intercept the SMS messages. For this reason, we strongly recommend that you download and install
BlondieSoft's Windows Mobile Certificates first."
I installed without the certificate and it works ok probaly b/c im on a custom rom but it prompts yuou with somthing along the lines of "if you recieved a screen asking if you trust the publisher........ you should install the certificates first"