What do people think of voice chat instead of text around games like online bingo?

I am wondering whether people would be interested in chatting via traditional telephone (not voip) in a conference like setting through an 800# when playing games online like bingo? for instance instead of chatting with people in the room through typing in text messages, you would call an 800# through your traditional phone and be connected in to a conference room type setting where many of the players would be in the room together and able to talk using their own voice and get to hear each other and chat away like friends.

Unless Everyone had a speaker set-up to their phone that would be difficult to use.
I play Battlefield 2 and it is essential to talk to squad members during the game. Typing messages tends to get one shot.
In this game it is very difficult to type things to others in the game while you are being shot at making VOIP essential.

There are also gaming sites that offer chatting while you are in a game. The one that my friends and I use is X-Fire. It allows us to talk on a seperate line outside of the game's VOIP.
X-Fire also allows you to find your friends, on-line, in a game while they are playing. It's also free to everyone, making it a nice site.