We went to Orient Beach as part of an excursion. It is on the opposite of the island from Phillipsburg but I can't imagine it would cost more than $25 rt. Check the St. Martin tourist site, they might have fixed taxi rates.
A Bad Day At Sea [with power] Always Beats A Good Day At Work
Alaska 2014 - haven't picked a cruise yet
Carnival: Glory 2004, Destiny 2008, Splendor 2009, Freedom 2011, Valor 2012
Celebrity: Summit 2011
Princess: Ruby 2010, Caribbean 2013