International Journal of Community Currency Research (IJCCR)]
This link will keep you reading abut LETS for days:

• International Journal of Community Currency

A specific set of links listed by Tony Budak
History and background - alternative currencies:

• Local currencies - Eikipedia
• An interview with Bernard Lietaer by Sarah van Gelder
• New Economics Institute
• Alternative Currency Systems - Local and Interest-Free Currencies, Social Credit, Social Lending and Microcredit etc.
• A Proposal for a Brazilian Education Complementary Currency ("Learning Currency") by Bernard Lietaer

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Complementary Currency Resource Center (CCRC)

• CCRC Home Page
• CCRC Case Studies, Research Reports & Analysis
• CCRC HelpDesk

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Conference Proceedings

• International Conference on Community and Complementary Currencies
• Urban Affairs Association 42nd Annual Conference

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Finding FOCUS - Short of time, then research these selected time trading projects

• Strohalm Foundation - Holland
• Strohalm's software from the program designers
• UK Local Exchange Trading and Complementary Currencies Development Agency - London
• Fourth Corner Exchange - (for profit) Pacific Northwest
• Timebanking Wales
• The New Economics Foundation
• Value for People

If you have no time to research, just click the links below:

• TimeBanks Washington D.C.
• TIMEBANK DEMO SITE
• TimeBanks WorldWide Discussion YahooGroup

See this Video

• Time Banks: People Make Change Happen

An Example of a Network of TimeBanks

• Dane County TimeBank
• A 'How To' Roadmap: The Time Dollar Manual