I like the ad code you're using in so far as the text size and layout. But I think the picture could use a bit of sprucing up (maybe add some of the current player characters in a collage of some sort over the world?)
I also think you need to pare down the intro text. Its the same as what you read on the main profile for the game. You need a better teaser, that actually is a teaser. Maybe with some references to what is currently going on in the game to get people thinking and imagining the possibilities of what they can do and get out of the RP experience.
Like a fanfiction summery. You don't give all the details, just a few juicy bits to get someone to read the damn story.
as for the banner image and stuff... well, photoshop is continuing to refuse cooperation with me. I'm probably going to have to download GIMP for the time being... *sigh* But I can help out on that if you'd like.