OT: Cross-platform document format?

[Kent West <westk@acu.edu>]

Sorry for the off-topic post, but I figure you folks are some of the best to ask this question of.

Is there an open document format that is widely available on Windows, Mac,
 and Linux, that can do all the stuff that the proprietary formats (.DOC,
 .WPD, etc) can do (such as graphics, tables, columns, font/attributes, indenting,
 justification, super/subscripts, footnotes, endnotes, math formulas, etc)?

My goal is to try and weed campus staff/faculty/students away from proprietary
 formats (esp. .DOC) to open formats, for three reasons:
    1) prevent the spread of macro viruses
    2) increase cross-platform/version compatibility
    3) decrease the reliance on MS-Office so it'll be easier to convert them eventually to a different OS (hint hint)

Thanks!