The host I use has a 18-hour a day chat room with someone manning the room from the staff at least 18 hours a day.

As soon as I saw it I tried it out for presales questions, and have been back for a few support things since, really great idea and gives a sense of community because usually there are more than one customer in there, when a problem is solved, everyone learns something.

I really like it, and have been thinking about adding it on for our site.

Enough rambling, I choose a chatroom as a preferred method of support