A simple yet effective "Jump To Top" button in posts.
<a id="top"></a> would need to be specified at the top of the header template, or you could use the "headerProxy" id I think? Anyway.. Would be nice
Of course I'm sure, true to XenForo form you could make it slide in a jQuery awesomeness fashion, similar to the jump to quotes, but that's not a requirement of this little suggestion
Edit: I did search for this, but, "top" is too short/common/whathaveyou