One of the things that I look at when I test out a new software is how well it is suited for its purpose and how easy it is to use. Ease of use entails two things for me, first, how intuitive is the interface and second, how clean the GUI is for the user. I have found that an uncluttered interface helps the end-user to easily see the information the program is presenting and allows you to use more efficiently.
For those of you that are active in Facebook and use the chat feature a good bit you may want to opt for a UK product called Chit Chat for Facebook. If you have a Mac computer you are currently out of luck but if you are Windows PC user, iPhone or Blackberry smart phone user you can download the app on these system. You can use it on your iPad as well but it has not been optimized for that device. If you have an Android device you are also currently out of luck.
This product has a simple streamlined interface and provides a smaller more specific screen footprint to allow you to continue working on your PC while trying to keep in touch with your Facebook IM. If this is something that you find you are doing a lot of, then this might be just the product for you.
A few screen prints have been provided here:
http://images.chitchat.org.uk/fbwebmessenger_screenprint3.png
http://images.chitchat.org.uk/fbwebmessenger_screenprint1.png
http://images.chitchat.org.uk/fbwebmessenger_screenprint2.png
