Hey scottcobb the best MPP viewer for the medium business is the vallyspeak project server,it is a MPP Viewer enables viewing and sharing of Microsoft Project schedules with team members in real time. While most of the Project Management Software in the market allow team members to view the project schedule, but not update the task status. Where as with Valleyspeak Project Server team members get a easy browser access where they can view and update their task and get it approved by the Reviewer/Project Manager for more details visit www.valleyspeak.com