Elegant Angel has trailers for a bunch of their more recent movies as well, but you do need to sign up for a free (no credit card or other monetary information) account on their forums to watch the trailers.
Digital Playground has quite a few as well, but all of them now seem to be "softcore", presumably for legal reasons.
Platinum X has trailers up for it's latest releases. I don't know why they remove the trailers once a "new release" is no longer new though. That doesn't make sense to me as a consumer, because I use trailers as one of my tools in deciding whether or not to purchase the DVD.
About the Redlight District Trailers: They used to have lots of full length trailers on their site, but I see that it is now primarily geared towards being a "pay site", and the dozen or so "trailers" they have up are only 30 seconds long and are just a clip from a single scene. Again, I don't understand this; trailers are a good tool to sell product to us.
Dr. P
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