Okay, I think we both misunderstood what you wanted. If I am reading correctly, you just want to edit your signature on this site to show only the name of your Blog.
To do that click on User CP in the upper left corner and find the Edit Signature link and CLICK. When there, you will see your blog address. To get this to show only the name you must follow this format:
[url+http://INSERT YOUR BLOG ADDRESS][THEN INSERT THE NAME YOU WANT TO APPEAR IN THE SIGNATURE FOLLOWED BY [/url]
You must have all of the brackets and things above in those places. Just drop the capitalized typing and insert your specific info in those two places, but make sure to leave the brackets and other info as is.