I want to add ZopIm into my WordPress site (gettechgo.wordpress.com). I need to interact with people and that provides inline chat functionality. I can provide you with the script, which is required to be inserted into the <head> tag for the main page.
At present there are no chatboxes available I am aware of that can be used on free hosted WordPress.com blogs. There is no FTP access and we cannot install chatboard or forum plugins for security reasons. They are only for WordPress.org installs and can’t be used on free hosted WordPress.com blogs. http://support.wordpress.com/com-vs-org/