Podcasting:
http://www.edtechnetwork.com/podcasting_vodcasting.html

http://blog.simplek12.com/education/5-classroom-uses-for-podcasts-plus-real-life-examples/

http://fcit.usf.edu/podcasts/

http://edtechteacher.org/index.php/teaching-technology/presentation-multimedia/podcasting

http://beyondpenguins.ehe.osu.edu/issue/polar-oceans/podcasts-in-the-elementary-classroom-tools-for-teachers-and-students

http://www.readwritethink.org/classroom-resources/printouts/podcasts-nuts-bolts-creating-30311.html

Screencasting:
http://www.schrockguide.net/screencasting.html

http://www.screenr.com/