Google Spreadsheets to get charts as early as tomorrow?

Yesterday I posted an article about a bunch of hidden code I found inside Google Spreadsheets -- and just tonight, Michael Arrington has some information about a possible "major announcement" from Google tomorrow.

Well, to add fuel to this fire, I can guarantee this file didn't exist yesterday (I specifically looked for it) -- it clearly shows a new icon that will be used on the Google Spreadsheets toolbar.

Given all the rumors and hidden code floating around, it is very likely we will see an announcement about Google Spreadsheets tomorrow (the addition of charts, and probably integration with Google Apps)

Let's see what happens!