I asked myself this question last night and decide to figure it out
using the Kitesurfing Search Engines (including more than 500
kitesurfing sites) at http://kitesurfingschool.org/search.htm

If your site is not on the Kitesurfing Search Engine, please let me know
(just do a search on the site to see whether it has already been included).

So I just type in the name of the site to figure out how popular it is:
kitesurfingschool.org, kite-surf.com, kiteforum.com, naishkites.com,
bestkiteboarding.com, northkites.com, etc.

kitesurfingschool.org: 5 pages
kite-surf.com: 3 pages
kiteforum.com: 4 pages
naishkites.com: 6 pages
northkites.com: 4 pages
sskiteboarding.com: 3 pages
monkeykites.com: 3 pages
oceanrodeo.com: 4 pages
bestkiteboarding.com: 8 pages
cabrinhakites.com: 5 pages
kiteship.com: 1 page
kiteboat.com: 1 page
cautionkites.com: 1 page
Peterlynnkites.com: 1 page
wipikakiteboarding.com: 3 pages
takoon.com: 4 pages
ikiteboarding.com: 6 pages
ikitesurf.com: 5 pages
flyozone.com: 3 pages
cenceptair.com: 1 pages
Litewavedesigns.com: 1 pages
kitepower.com.au: 3 pages
offdalip.com: 2 pages

Please verify whether these numbers are correct and let me know any
sites we should remove from or add to the Kitesurfing Search Engine.

Please add more...

Thanks,

Hung.