On youtube.
So far there are 3 New Moon trailers. See them here: http://www.youtube.com/user/OfficialTwilightFilm
Probably November.
new moon trailers will be released in october =) Actually, since New Moon is being released in November...the trailers will be released much sooner than October! Last year, the teaser trailer came out in the summer (June/July) and the first scene was released in August/September, with the official trailer not far behind. It will probably be the same for New Moon...
Trailers won't be available until February 2009.
There are many different places that these can be purchased. One great place to find used car trailers for cheap is by contacting the U-Haul company as they sell their older ones when purchasing new. Another great place to find them is http://www.buyutilitytrailers.com/Trailers/Car-Trailers.
There is a company in Christchurch, New Zealand called Trailerstation. They rent out trailer of all different sizes for any need you could have. They have flat bed trailers, and fully enclosed trailers.
The website www.truckertotrucker.com has a variety of new and used reefer trailers. They offer financing options also, which would be beneficial to anyone starting a new business.
There are several locations that sell used and new trailers. A phone book can be used to find local trailer dealers in your area.
Searching the net for new vehicle trailers there are several websites offering either new trailers, second hand trailers or both new and used trailer sails. Trucker to Trucker offer both new and used vehicle trailers for sale.
Not that i know of. And they probably won't. I'll edit this again if i find new info.
New Moon
There are many places where one can find more information about refrigerated trailers. One can find information about refrigerated trailers at popular on the web sources such as Polarking and Great Dane Trailers.