Encountered what I think is a unique bug using my Nexus One Google phone. When calling out the answering party could not hear me talk. However, incoming callers had no problem hearing me. Clearly this is not a hardware problem. As others have discovered, there is no way to contact Google for help except via email. Email to Google must be routed to the trash, cause there was no acknowledgement or response in over 24 hours. I called the service provider, T-Mobile, who rerouted me to HTC. HTC was very professional and resolved my issue. Just restore the phone to its factory settings, log into your gmail account and all is well.
The Nexus One with Android is really a great system. However, the total lack of customer support from Google ruined the experience. Until Google wakes up, I can never recommend anyone purchase their phone or use their services. Google customer service is the proverbial black hole.
Time to switch back to an iPhone.