I actually finished this last night, but I didn't post about it and decided to get some sleep instead. It's an extension on the console component I integrated a few weeks ago. It adds support for auto-complete and command suggestions. I might add an argument-completer as well in addition to some layout fixes.
(watch in HD 720p + fullscreen to read the text)
I originally got this idea from the UDK console that has a similar feature, it should make browsing and finding commands much faster and easier and doesn't rely on software knowledge as much.
It's based on the GameConsole by Vos which I believe is one of the best console component for XNA.