Joyce Valenza and Kristen Swanson, have assembled a good collection of Web 2.0 tools and guides for teachers. The collection is part of STHS Library Guides. Their new tools catalog is organized by function (wikis, podcasting, etc) and topics related to technology use in schools (media literacy, fair use, privacy).
Applications for EducationIf you're the technology integration specialist or just the "techy" person that everyone goes to, the STHS Library New Tools is a good site to refer your colleagues to when they need a quick reference to learn about new tools.
An amazing array of resources for education: digital storytelling, copyright/creative commons, tag clouds, mindmapping, digital citizenship and more. Take 10 minutes to peruse this - impressive collection. Looks current, too.