A quid is a slang term for the British pound. So currently, 1000 quid (or 1000 pounds) is about $1500 US dollars.
Sidebar is a theme feature introduced with Version 2.2. It's basically a vertical column provided by a theme for displaying information other than the main content of the web page. Themes usually provide at least one sidebar at the left or right of the content.
A panel, or sidebar, is found on either the right side (default) or the left side of the Windows desktop in the Windows Vista operating system. Gadgets can be placed on this sidebar, and they are automatically aligned on it.