Announcement Propagation Delay in BGP

I am going to be announcing two new prefixs into BGP soon and the netgeek in me is very curious as to the length of time it takes to show up in other parts of the world that're logically far from Hawaii. Instead of going to www.traceroute.org and refreshing repeatedly, I thought folks here might've created a tool to do just that. Or, perhaps, someone else has stats on a test they ran in the past. Anyone got any tools or suggestions on how to measure this just for fun and not as a scientific study? I plan to read the beacon paper "sahara.cs.berkeley.edu/papers/MMRB03b.pdf" but I believe this mostly looked at how long-period flaps (2 hours) were still punished. Any other pointers? Thanks, scott