There’s an interesting paragraph over in a blog posting on the official Linden Labs Second Life site:
The Excel document of these metrics is available here, and by popular (and logical – thank you JayR) demand, the OpenOffice format of the figures is available here. For those not equipped with Microsoft office, I can recommend to you to Google Docs to handle the excel file, or the Open Source and free Open Office suite. For your convenience, I have published a copy from my own Google Docs location that you can view directly here. We are getting very positive feedback on sharing this in an open, manipulatable format rather than a fixed format such as PDF, so that you can report on these figures in your own way.
By “OpenOffice Format” they mean ODF, the OpenDocument Format.