I'm sorry but the answer is "no". Here at wordpress.com all widgets can only be placed in sidears. They cannot be placed in posts or on pages. They cannot be placed in footers without a CSS upgrdae.
Will you change the link to your wordpress.Com username and link it to your wordpress.COM blog please. Dashboard -> Users -> Personal Settings -> then scroll down to Account Details. Then scroll down to where it says ‘Website‘ select the URL for your primary wordpress.com blog starting and then save changes.
Now every time you sign into the forum we can all click on your username and your blog will be linked to it. And every time you leave a comment on a blog your username can be likewise clicked and your blog can be instantly located.