An insightful discussion has been going on recently on the OSGeo-Discuss mailing list, around the question Can I do the same GIS tasks with OS (as with ESRI)? Among the main points: if you think open source, think modular. And: Good cartographic output remains a problem for open source. Other interesting issues are discussed, for example db capabilities.
ASA software offers an interesting addition to ArcGIS.
After registrationÂ you can download the free TimeSlider Extension (ArcGIS Extension for Version 9.2). It animates time-dependent shape files in ESRI Arc 9.2 products (includes demonstration data featuring temporal/time step functionality). Also available for Arc 9.1.
Harvard University’s Introduction to ArcGIS tutorial includes videos and hands-on exercises.
ArcGIS 9.2 workshop materials from Yale University Library.
Center for Ocean-Atmospheric Prediction Studies at Florida State U offers free tutorials and online courses for open source GIS.
University of Arkansas Libraries GIS tutorials