I finally received an invitation to Google Voice two days ago and set it up to use for voicemail only on my Droid. Today, I received the first telemarketer call I have ever had on my cell phone. I didn't recognize the number so I sent it to voicemail. They wanted me to call to lower the interest rate on an account I don't have.
In five years, not one single telemarketer call. Start using Google Voice, get a call.
I never give my cell number out to anyone I don't know personally...just family, friends, and clients. I have never, not once, entered it on any web page except for signing up to Google Voice.
Did you get a Google voice number, or simply use your existing one? If you got another number, then anyone could have had it before you, and you are essentially on any list they were on. It's just how phone numbers get recycled now.
When i first got my own line on Verizon, I was receiving BS text messages from a "service" in south america somewhere. They billed me 20 bucks on my first bill before i could get Verizon to cancel it, just because someone who had my number before me probably texted some tv commercial.
If you didnt get a GV number though, then i dunno. I've had it for about a week now and havent gotten any calls to my GV number other than people i know.