I had seen an early prototype of the Microreact website while I was in the UK in 2010 – it is now live here. It is the work of David Aanensen and his team at Imperial College, UK, and was funded by the Wellcome Trust. Simply load up a spreadsheet (with latitude and longitude coordinates) and an accompanying phylogenetic tree (the exact instructions are here) and then play around.
Matt Holden had uploaded the Singapore MRSA data (thanks Matt!) and I have taken a few screenshots from the ST22 and ST239 project sites. Certainly seems to be fun to visualise all the data – although unfortunately it is not mobile friendly at present.