Ooooooooooooo

o.com,
oo.com,
ooo.com,
oooo.com,
ooooo.com,
oooooo.com,
oooooo.com,
oooooooo.com,
oooooooo.com,
ooooooooo.com,
oooooooooo.com,
ooooooooooo.com,
oooooooooooo.com,
ooooooooooooo.com,
and oooooooooooooo.com
are all registered domain names (although those with 12, 13 and 14 Os have expired).

I am also amused by the fact that
worldcup2006.com,
worldcup2010.com,
worldcup2014.com,
worldcup2018.com,
worldcup2022.com,
worldcup2026.com,
worldcup2030.com,
worldcup2034.com,
worldcup2038.com,
worldcup2042.com,
worldcup2046.com,
worldcup2050.com,
worldcup2054.com,
worldcup2058.com,
worldcup2062.com,
worldcup2066.com and
worldcup2070.com
are all registered too. Quick, grab worldcup 2074.com before it goes!