Slap this in your postbit somewhere....
HTML Code:
<if condition="$post['birthday']">
<img src="$stylevar[imgdir_misc]/birthday.gif" alt="Today is $post[username]'s birthday!" border="0" />
</if>
It will show a birthday cake in the post.
--------------- Added [DATE]1263818863[/DATE] at [TIME]1263818863[/TIME] ---------------
Actually, that doesn't work the way I thought it would. I'll have to get back to you on this.