From Slashdot.org:
This marks the tenth anniversary year of the office suite, with over three hundred million downloads recorded in total. The new features include faster start up times; improved compatibility with open standard (ODF) and proprietary file formats; improvements to all components, particularly the Calc spreadsheet, with over a dozen new or enhanced features; and the Chart module (usable throughout OpenOffice.org) has had a usability makeover as well as offering new chart types."
http://www.openoffice.org/dev_docs/features/3.2/