Google Voice / GV apps -- and blocking calls/SMS
I am aware that AT&T Smart Limits can be used to block selected phone numbers from calling or texting, but I think it's absolutely ridiculous to have to pay $5 monthly for such a thing and will avoid doing so at all costs. It's not expensive, but it's irritating that we should have to pay for that when we already pay a decent amount monthly for iPhone plans just to have the phone.
The silent ringtone trick isn't satisfactory to me. What I'm wondering: how exactly would one go about using Google Voice, or any other app or service, to block certain numbers from either calling or texting me? I have never used GV, so I don't really know what I'm doing.
Running iOS 4.1 on an iPhone 4. Best I can tell, iBlackList or whatever the name is can be used if I jailbreak the phone, but I figured I'd try to do this on a stock iOS install first.
15" MacBook Pro (06/2009), Mac OS X (10.6.4)