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I am a corp. pilot. I use these sites very often.
Weather Underground (Mobile)
(excelent site. You can look up most ecery airport and get weather, maps, etc.
(from here you can do a lot of stuff. The page doesn't fir very well on the BB though.
I do not use wxsys. I did buy it, but don't use it. To me, it is not at all user friendly.