Academic journals and trade publications are good sources of information about all kinds of practices and technologies. The trade publications give you the best source of truly current developments; the journals offer more rigorously tested conclusions. You will probably need to visit an academic library for past issues of most journals.

Civic.com: http://www.fcw.com/geb/

Government Technology: http://www.govtech.net

Governing: http://www.governing.com

Public Administration Review

Public Productivity Management Review

Journal of Public Administration Research and Theory

CIO Magazine: http://www.cio.com

Public Administration and Management: http://www.pamij.com