Communications Widgets
Google Talk – Give visitors the ability to talk to you via Google Talk directly from your blog sidebar.
Jaxtr – Create a widget that allows people to call you on the phone without revealing the phone number to them.
Meebo Me – Meebo Me will allow you to create a chat box that you can install on your Blogger page, giving you the chance to converse with visitors to your site.
Skype – The official Skype widget allows you to create various buttons that can show your current status and also allows people to just click it and give you a call.
Tag-Board – Allows you to add a real-time chat board to your blog that your visitors and you can use to converse.