I found this userscript in the Stack Apps.
- http://stackapps.com/questions/2043/a-way-to-keep-the-user-bar-on-the-top-of-the-site-stuck-there-stickybarhttps://stackapps.com/questions/2043/a-way-to-keep-the-user-bar-on-the-top-of-the-site-stuck-there-stickybar
It does what you are looking for. It stickies the top bar so it stays visible even if you scroll down the page.
