IIRC, Ortiz went into 59 with a torn up knee or some sort of leg injury, which seemed to really affect his shooting for the takedown. From ultimate fighter 3 season, Shamrock just looks like an over the hill punk ass...Ortiz seems to be a pretty cool dude that just eggs people on that piss him off lol. Watching their training, I don't think you could convince me to train under Shamrock, though granted I'm only seeing a small portion of what's going on.
Arlovski's a great fighter, he just got cocky in that fight. The downside is this has shown he can get dropped with one punch, so people may not be as scared of swinging with him as they have in the past. Silvia's an interesting fellow...I wouldn't count him out though, he's still improving his skills.
Personally, I wanna see more of Dean Lister fight. That guy has INSANE ground skills.