Is there a plugin to show the code tag button on the visual editor?

I write a programming blog, so sometimes I just have to write a word to represent a command or function which I like writing between the code tags. (See, what I just did there).

So, just like StackExchange has the “code” button, is there a plugin to add this button to the visual editor? I know I got it on the HTML editor, but I rarely use it.

I was thinking of writing a plugin for this, but just in case I’m asking first in case anyone knows of a plugin doing this already.

There seem to be a few people scratching this itch over at the TinyMCE sourceforge tracker. http://sourceforge.net/tracker/?group_id=103281&atid=738747

This looks promising.. “CodeExtras adds <var> and <code> markup buttons – ID: 2904557″
http://sourceforge.net/tracker/?func=detail&aid=2904557&group_id=103281&atid=738747