You can all use the respective participation badge now, that way the GB will get more publicity even before it starts.
You can also make the badge a link to the GB thread, like it is in my signature, using the following code:
<A href="/forums/846344/ShowPost.aspx"><img src="insert image url here" border=0></A>
You will need to put the URL of your respective badge in the code in place of the italicized text. Once you've done that, copy all the green text into your signature.