OpenOffice.org, the increasingly popular Office-like productivity suite is finally native on the Mac with the latest releases, still in Release Candidate, although hopefully close to a stable full release. Since Sun has bought OpenOffice it’s been looming in the background as a potential Office killer. But OpenOffice has never taken that step. People seem leery about it, not wanting to retrain users, not trusting of a new, weird app. Understandably, most everyone on the planet seems pretty darn used to using Office at this point, and users don’t typically take well to change. The new document formats for Office, .docx (for Word), pptx (for Power Point) and .xlsx (for Excel)…