Hello, I'm Bidoofs, the webmaster of Global Trade Station Plus. We're a fairly new (open for ~2.5 months) Pokémon trading site and media resource.
http://www.gtsplus.net/
The main feature of our site is a coded trade station that we made ourselves that allows users to showcase Pokémon they're offering for trades, and make very specific requests as to what they want for them. We also recently added a new feature allowing users to list off what they're looking for, and, should someone post it, opt to automatically receive a private message and/or email, notifying them of it and linking them to the trade. Note that the bulk of this is only available to registered members, although guests can still view some of our trade station as well.
Another of our features is a growing section of media resources. Our image gallery features a growing collection of high resolution Sugimori scans, as well as (to my knowledge) we're the only site that has shiny artwork of all the fourth generation pokes. One of the very unique features in our media resources is a "trainer shot" creator that allows users to choose pokemon and a trainer image, arrange them as they like, to create a signature image, and users can even have this image uploaded directly to Imageshack from our site.
Here's an example.
We also plan an opening a Pokémon roleplay in the future, which is currently under construction, and we will be hosting our second WiFi tournament in about a month's time, although there's no set date as of yet.
All in all, GTSPlus is a great site, and definitely worth checking out.
EDIT: Also, who would I contact at Psypokes if I were interested in affiliation? <<