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I once built a bicycle generator and actually it's sitting in Nicaragua just begging to be used by the right person who wants to take it home (just send me a PM if you want it).

Have you considered using a bicycle generator to power your kitchen appliances? It might work. How about to charge a battery to use your computer? That would be more difficult, but might work under the right circumstances. To grind grain? That'll work. Read about more possibilities in this group:

http://tech.groups.yahoo.com/group/hpwd/