As far as I'm concerned, every midfielder and every striker dives at least on occasion. Rooney definitely doesn't dive as often as most players though, purely because he's able to outmuscle a lot more defenders than most strikers are able to. Every player makes the odd poor tackle, too. Some dive and make poor tackles more than others, of course (hi, Reyes).

Unless something is done about it - my preference being the ability to book a player for diving or a poor tackle after a match and during half-time. Possibly even causing them to miss the next game if it comes to that. When so many dives and poor tackles have been shown to be blatant yet the referees miss it because of the speed of the game and their own uncertaintly / lack of view at the time... you just have to wonder why they can't look at the cameras afterwards and say "Hey, that's bad."

That's why football is considered to be a wussy sport by most die-hard rugby fans. Hell, even cricket players are more manly then footballers.