Here are some basic links to get you started in electronics...

Michael Field´s Legendary Electronic Introduction. For the begginers
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Tom Igoe´s Physical Computing Blog. The best resource for academic use of microcontrollers, sensors, actuators, networked objects, etc.:
link
... the book "Physical Computing" by Dan O'Sullivan, Tom Igoe is highly recomended
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Parallax, manufacturers of the basic stamp:
link
Software, documentation, projects, exercises, and anything needed to start:
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Microchip. manufacturers of the pic chip:
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Farnell. Suppliers of all material related to electronics and more
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App to program stamp chip with Mac OS X (10.2.8 or newer) developed by Murat Konar. ( thanks Murat!)
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… take a look to his amazing work!)
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low tech vs High Tech Workshop
Roger Ibars vs Victor Vina
November 2004
MID Ecal (Switzerland)