Link:
http://androidforums.com/evo-v-4g-a...od-jelly-bean-voice-assistant-google-now.html
I just flashed this a half an hour ago and it works.
"- Flashable zip deletes previous "GoogleQuickSearchbox.apk", "GoogleTTS.apk", and their odex files Some Custom Roms may have have these named differently so you might have to manually delete them before flashing this -Plz see Rom Dev". I renamed both .apk's with a .bak in case I ever wanted to go back to stock.
The only crappy thing is Google Now is not supported for our phones on the Play Store. Anyone know how to update this at all?