People have noticed a large increase in page hits and bandwidth usage, caused by Yahoo! Slurp recently.
I run several sites and I have the same problem. In fact, if Y! were to send me 1 visitor for every 10 bot visits I would need a dedicated server to handle the traffic :o)
i used to get like 4-5 at a time, but in the last few days it jumped like 8-10 and today it was an all time high of about 18 yahoo bots at a time. i havent checked the total of the bots/day but its surely going to be a larger number today
There are enough posts for me to report this, but not enough to say this is happening to a large percentage of site owners.