To add your business customer service value, you can embed a live chat IM (Instant Messaging) into your website and blog. Let the visitors / customers can ask questions and get in touch with you in real time.

Embed IM (Instant Messaging) into your website and Blog

Most of these service are FREE and include with the most popular IM, eg. MSN Messenger, Yahoo! Messenger etc.

Meebo
Instant messaging right from your web page & Blog.

Embed IM (Instant Messaging) into your website and Blog

eBuddy
Web based messaging for everybody everywhere.

Embed IM (Instant Messaging) into your website and Blog

Plugoo
Interact LIVE with your website visitors

Embed IM (Instant Messaging) into your website and Blog