Got the soft key changed to Google. Long press does nothing, but I'm OK with that. Voice search is just an extra tap on the microphone icon once the search menu comes up. Just like in 2.1 adding .old at the end of the Bing apps to still works. These are the ones I renamed using the free app Super Manager:
/data/app/com.microsoft.mobileexperiences.bing-1.apk
/system/app/I500_BingSearchAndroid_11122010.apk
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