This gadget enables you to add a guestbook in your Blogger sidebar:

A guestbook allowing visitors to your site to leave comments on your page. Customer feedback and word of mouth can be the most important selling point for your web site. Share what your users say about your page with this guestbook. 

To install in your blog, you will need to add a unique name for your guesbook. The colors and sizes of fonts may also be configured in the gadget options prior to installation.

Here is a screenshot of Guestbooker in action:

Developed by Fourth Floor Equipment

Add Guestbooker to your Blogger Blog