Small Corporation transitioning to Open Office 3

Pay The Piper writes: "As an IT Support Technician in a small corporation, I've been tasked by one of my managers to determine the feasibility of transitioning our small 40 or 50 person office from Microsoft Office 2000 to Open Office 3.0. What are some of the problems I may run into as far as document cross compatibility? Has the Open Office suite evolved to a point that permits easy transition from Microsoft's suite? Besides the obvious "free vs. expensive" argument, what are some of the pros and cons of transitioning? Are there any reliable ways to view/edit/save a document saved in the OpenXML format through Open Office, or are my co-workers and I still going to be stuck in Microsoftland?"