I found the gouges on aviationinterviews to be pretty accurate. And the written wasn't as hard as people on there make it sound. At least for me it wasn't. As for the tech portion, I got asked really basic systems questions. Know your Jepps. And be sure to know the 121 regs. One of the guys who I interviewed with wasn't hired because he answered all 135 stuff. And hopefully you won't go first to the HR/Tech, that way you can ask the people who go before you what they ask. I'm pretty sure they ask everyone the same questions. The interviewer had a 3- or 4-page list of questions, and he just went through them all and wrote down my answers.
All in all, it was a fairly easy interview process, and everybody there was very friendly. The worst part is all the waiting, especially if they have like 20 people to interview like they did when I was there. But atleast they tell you that day if you're hired or not, so you don't have to go home and wonder.
Good luck, maybe I'll see ya in Memphis!