I have texting completely disabled on all my phones. I really don't see the point to it, when I pay for a data plan and have eBuddy running on it all day. For those 2 or 3 idiots that insist on texting me instead of calling me, I have them text me on my Google Voice number.
But the real thing I like it for is this...
I have a Droid that is my personal cell phone. Work gives me a Blackberry to use. My Blackberry and my Droid both share the same Google Voice voicemail box. So, on the weeks I am not on call and don't have my Blackberry on me, if someone does call me for some reason, then at least I get a voicemail indicator popup on my Droid.
If you're a parent, you can give your Google Voice number out to your kid's school, scout leader, etc, and then link all your phone numbers to that Google Voice number. Your kid's school is closed early, and you need to go pick them up. They call your Google Voice number and all your cell phone, you wife's cell phone, and your house phone all ring at the same time.
Soon as GV lets you port numbers, I'm porting my home number to GV, turning off my landline, and linking my cell phone to it.
Being able to text from
http://www.google.com/voice is also really nice. I hate typing on the phone. I'd rather type on a full size keyboard.