I don't mind going to a website, just wish it wasn't my email. Would prefer making the calls right from google voice as thats the most likely page I'm on when I'm checking voice mail or texts.
I kind of like it being in Gmail because I always have that tab open no matter what. I agree that a deeper integration with Google Voice would make a lot of sense though. I've never understood why SMS messages that you send from Google Chat can't come from your Google Voice number. It comes from your Google Voice number when you make a call so it seems strange to me that your texts come from some other number that they assign to you.