In regards to the Rooney offside, the rules were recently (last year?) 'Reinterpreted' to mean that its not an offside anymore.
Personally I disagree with it, but eh.
In regards to his dive, obvious blatant dive but it opens up a new argument I'd be interested in your opinions on: If a player lunges in two footed studs up at you, and you jump over it thus avoiding contact, isn't that still a reckless challenge and foul?