I have noticed a seemingly non-trivial correlation between when googlebot is hammering my sites and when yahoo slurp is active. Frequently, they are pulling the same URLS - not at the same time, but within minutes of each other.

Anyone else notice something similar? I think I am going to write something to try to graph the similarities to see if I am just being crazy or if there is something to it.

I think that it will be time wasting... What will it give you? I think - nothing. And I'm sure there are no regularity with those visits.