Well there has only been a couple of people who have given there opinion so far.Another one was Ponting when he was the first one to reach 3 figures in the Ashes Series, not my favourite but a good one. Btw why are most of the people mentioned Aussies. :S
It was 'only' 206 actually - if he'd made 300 we wouldn't have lost - but I think I agree. Given the state of the series and quality of the opposition.My best peice of batting in the last year has to be Paul Collingwood when he scored 300 in Australia
In Tests a few that come to mind are Sangakkara's twin tons in NZ as Dasa mentioned (could easily be undervalued because of the low-key nature of the series); Kevin Pietersen's 142 against Lanka at Edgbaston (just over a year ago, but fits IMO), Gilchrist's blitzkreig at The WACA and Collingwood's double-century at Adelaide Oval. Hard to say definitively that any of those were the best TBH, but if I had to choose I'd go for Sangakkara.
In ODIs the Gilchrist knock in the WC final or the Jayasuriya dissection of England's excuse for a bowling-attack at Headingley last summer stand-out above all for me. Grudging mention, obviously, to the Hayden 18whatever-it-was*.