There are alot of hicoos (thanks Teflon) floating around, and everyone is asking the same questions, so here is library of very good sites that tell you all about it, fomr its history to its modern inceptions, perversions and general 'not really poetry in any way' forms.
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I've written on it before but if your interested check these out. They really do help:
These have been an invaluable source of information so I think everyone who enjoys the Haiku form will like them too.
Ask not what you can do to poetry, but what poetry can do to you.