The 4.0.x version of this mod is here:
https://vborg.vbsupport.ru/showthread.php?t=248569
Digitalpoint looks like they added the twitter code to one of their breadcrumb templates...
You can add it directly below "Forum" (on their page) by adding the code to FORUMHOME template right below the navbar code- so something like:
Code:
{vb:raw navbar}
<div id="mytweetbutton" style="height:30px;">
<a href="http://twitter.com/share" class="twitter-share-button" data-count="horizontal" data-via="YOUR_TWITTER_USERNAME">Tweet</a><script type="text/javascript" src="http://platform.twitter.com/widgets.js"></script>
</div>
But again this is for 4.x version only, not relevant to people using this on 3.8. Please continue the discussion in the 4.x thread.