How to get google talk badge
It easy, Goto Google Talk Badge Official Site then with your google account. copy and paste the HTML code in the below of page into your web page or blog. If the site that hosts your web page does not support direct HTML editing or embedded frames then click ‘Edit’ to select a style of badge that does not use frames.
How to add the badge code to your blog
For Wordpress, Login tou your wordpress blog in the appearance click widget, ad a text widget, edit then enter the code. (your wordpress themes must widget ready, if no, add the code manually)