are there any maori olympic participants?

Yes, there are a number of Maori Olympic participants!

The Maori Sports Awards web site at [
http://www.maorisportsawards.co.nz ] has a list of Maori Olympic
contenders. The lists are located on the following 2 web sites:

[ http://www.maorisportsawards.co.nz/news_olympic.htm ]
[ http://www.maorisportsawards.co.nz/news_olympic_2.htm ]



This is actually a somewhat difficult topic to find information on.
The following searches pulled up some limited information, but
required a bit of browsing to obtain the information above.

"maori" + "olympic games" + "new zealand"
[ ://www.google.com/search?hl=en&lr=&ie=UTF-8&q=maori+%22olympic+games%22+%22new+zealand%22&btnG=Search
]

"maori" + "olympics" + "new zealand"
[ ://www.google.com/search?hl=en&lr=&ie=UTF-8&q=maori+olympics+%22new+zealand%22&btnG=Search
]

I hope this helps you in your research!

/ephraim