Everyone stop quoting Wikipedia. It's the friggin worst source for history. Go there to look up s**t about science, math, martial arts, s**t like that.
Very true. Anyone who has doubt, have a look at the discussion/history pages attached to each wiki, and see how anything controversial gets overwritten by nutters determined to have their say. Still, it is a good place to get names etc for a proper web search.
Second of all, someone's gotta explain to me how these people traversed huge distances in paddled canoes. How big were these 'canoes'? How did they overcome the whole "we need to eat and have fresh water" thing? What about the logistics of settling a completely new land? Supplies and what not...
I'm not saying I know more, I'm just saying that the logistics of this all seem really hard to believe.
Okay, this is a (admittedly large) Maori war canoe:
http://goaustralia.about.com/od/discovernewzealand/ig/Bay-of-Islands/Waka.htm
As you can see, these aren't little rowboats. Interestingly, the maximum size is dictated by wave action; boats larger than this are *less* stable, as a medium size vessel can 'go with the flow' while a larger vessel has to plough through the waves.
Food - The start of this article has a brief sum up of the ecospheres that ships form: I don't know enough about genetics to judge whether it handles that subject correctly, but the stuff on Heyerdayl is correct:
http://www.users.on.net/~mkfenn/GeneticsrewritesPacificprehistory.htm
Not that the article quotes theories and stories verbatim, including the most outlandish ones.
Catamarans are awesome - they are much easier to handle than a regular sailing boat, can carry more, and move faster. The downside is you don't have a keel, much less a centreboard, so going against the wind is a nightmare. Most of what I know about them is from actually mucking around in them though.