Live Chat Plugin
If you are looking for a live chat system without the monthly fee, then you might be interested in the Wordpress Plugin call (creatively enough) Wordpress Live Chat.

Install on your own WordPress and start to use it
Very clean code
Cute skin (fully customizable)
Create your own operators
Chat logs, of course ;)
More than one operators can reply the same user’s question
Visitors can fill out contact form when all operators are offline
Notification emails when visitor logs in chat (added in 1.4)

It's $15 (one time fee).
Request & Feedback Plugin
This plugin is made from the same people who make the Live Chat plugin (so you have some of the same features).

Install on your own WordPress and start to use it
Cute skin (fully customizable)
You may customize the display of the Feedback. You may either make them visible in your entire website or just the location of your choice.
You may create feedback categories for more than one product/service.
The added feedback may be voted or commented on by the visitors. The most voted feedback will be listed on top.
You may add status labels such as “New, Started, Planned, Completed, Declined”
Without having to use any code you may adjust:

Your feedback box size, color
Widget, size, color


You may locate the feedback button/window by using the, “top-left, top-right, bottom-left, bottom-right” options. You may adjust the left/right margins by the Offset option.

You can purchase it for $14
Update on Survey 2 Sale
I talked about Survey 2 Sale a few episodes ago, and I have to tell you that since installing it I've had a few people use the coupons that have been given out.This more than pays for the service and I'm getting a ton of information about how people have found my site and what they are looking or at my site. You can sign up for a free trial at www.weeklywebtools.com/surveysale (affiliate link)