Regarding the Brits, as I mentioned before, Obama is only "insulting them" in comparison to Bush and Blair taking turns going down on each other. I think Obama is sending the message that the era of, "You support us in one effort, therefore we're going to bend over for you," is over.
As for Italy, dunno. According to
this short blurb, the US offered to send rescue teams as well but Italy declined. So perhaps $50K is all they asked for.