OpenOffice has found a new customer base - senior citizens. :o) I know this because I pointed my mom to it and she downloaded it and has since gotten numerous friends to do the same. Every month someone new is downloading and asking for her help. They are using Thunderbird as well. There's a group of people out there almost living on their pc's -- senior citizens. The pc and internet is becoming their primary means of communicating as they get less and less mobile and they do not have the funds to purchase MSFT Office and no need for the wiz-bang automation tools. Well, in 19 years I'll turn 65 and maybe I'll need to learn OpenOffice by then. :)
Obviously, that's great that they have options, especially when funds are tight. My wife has some relatives who are in a similar situation.
Obviously (and I don't mean this in a nose-snubbing way), we're talking about a different user base than those using Excel as a BI client tool.
Though I'm sure JR will tell me that somewhere in the world, Grandma XYZ was tring to create asymmetic pivot tables of cross-stitch patterns and Ashon Kutcher dating transactions for purposes of deploying to the local town hall Bingo SharePoint site collection :)