Try Ping Plotter - I've used it successfully.. as of writing this message - I've had my computer running for the last 96 hours continously without a single hiccup (am downloading the complete Debian Linux)
All you need to do is type in the address you need to ping (do this before you connect) and hit trace as soon as your connection is secure..
Set the 'number of times to trace' to unlimited and the trace delay to 2.5 seconds for great results..
My most favourite site to ping is 'www.ryze.com' quite a lot of sites block constant pinging.. this one returns multiple results too.. so it works out just fine...
Rashid