Is there something like Mt.Gox Live but for Intersango?
I don't expect the same quality, but at least to be better than this horrible bugged mess which is BitcoinCharts/BitcoinWatch.
There does not seem to be a chart like that for this website. Not every exchange provides a live chart on its own, and asides the two websites you mentioned, there aren't any other that would provide access to a more "live" feed.
You could try slush's SierraChart bridge which supports all markets supported by bitcoincharts:
One does not exist but I have it on my TODO list (which is quite long).