Debates in the aftermath of the Google Spreadsheet announcement have climbed the mountains and traversed the valleys of Google's supposed master plan. They've covered the Google vs. Microsoft gorge, the trickling AdSense stream. What they haven't discussed is the file format war, and I suspect that this is far more important than it may at first seem.
These days it's not hard to pitch anything Google does as part of some brilliant strategy to dethrone Microsoft. Despite the fact that the two company's businesses touch at only a few points, the meme is that the two giants are fighting over the same pot of honey. After snapping up Writely, a web-based word processor, Google's eyes looked hungry for Microsoft's Office cash cow. The problem has been that, despite everyone's assumption that the two are locked in battle, it's not clear how a Google Office fits into Google's business plans. The question is made more complicated by the fact that there's currently no shortage of Microsoft Office competitors out there, and some of them are even free. There is no obvious link between Writely and Google Spreadsheet on the one hand, and Google's search business on the other. At least, it's not anything the analysts are talking about.
Standing on the shoulders of open file formats
Even if Larry Page and Sergey Brin don't have designs on toppling Microsoft Office, they do have a vested interest in toppling proprietary file formats (well, save maybe Google's own DRM). After all, what makes Google's Search possible? It's the fact that the Internet is comprised almost entirely of "open" HTML documents. The budding Google empire is built on top of an open file "format" with wide accessibility.
But there's a huge disconnect between the Internet and the rest of the world. While we marvel at the size of the web, we sometimes forgot about the mountains of word processor, spreadsheet, and database information housed "offline." And much of that is proprietary to some extent, stored in file formats that are not accessible or only semi-accessible to your average PC user with a web browser. This is where the Open Document format (ODF) steps in. As you may know, ODF is an open format for word processor, spreadsheet, database, and presentation files, based on XML.