That is great, almost what I was imagining. I think it needs more places to ping from and a map in the webpage.
Suggestions aside, look at the difference between HN and Google (measured in milliseconds):
us-east: 39 HN, 40 GGL
us-west: 128 HN, 118 GGL
europe: 186 HN, 109 GGL
tokyo: 291 HN, 143 GGL
sydney: 405 HN, 303 GGL
Kind of interesting, did not expect Googles latency to be that high in Sydney.