CIOs who are truly concerned with data preservation and open standards need to take a hard look at Microsoft's historical business practices and the remaining questions hanging over OOXML and ask themselves if it's worth making such a major transition to a format that is fraught with the same potential for vendor (rather than consumer) control in the future. SaaS options, it's worth noting, hardly escape this issue, so regardless of the very real potential that SaaS will eclipse any of the stand-alone office applications that are currently involved in this debate, it's still going to be necessary to pick a format for long-term, corporate control of vital data and documents.