Chris Mutel's presentation on renewable energy is here.

There is more information on tidal power found here:

• Wikipedia
• Department of Energy
• Department of Energy (for consumers)
• Blue Energy
• East River Turbines
• Giant Project in Phillipines

The company commercially making wave generators (Pelamis "sea snake") is Ocean Power Delivery.

There are also some renewable energy blogs:

• Alternative Energy Blog
• Renewable Energy Law Blog
• The Energy Blog