Microsoft are trying to help people migrate from previous versions of MS Office to v2007. That's helpful. Here are a few hints. Here's a whitepaper on migrating to MS Excel 2007 from previous versions.

And here's why the US Department of Transport has now banned MS Office 2007 and Windows Vista. Turnaround's a bitch, you habitual line-stepper.

Last but not least, let's not forget that Microsoft apparently benefits from pirating their software. According to themselves. And that doesn't stop MS from (at least indirectly) using pirated software themselves, e.g. this time.