Anilrgowda

Information On Yahoo Search Ip address and Yahoo's new Spider Yahoo Slurp
http://help.yahoo.com/help/us/ysearch/slurp/

Yahoo! Slurp is Yahoo!'s web-indexing robot. Yahoo slurp indexes the web following HREF links, Yahoo has launched their own PFI program named Overture Sitematch, More information on Overture Sitematch will be posted soon,

Yahoo Slurp spider/crawler/robot IP address list,

66.196.65.38
66.196.73.96
66.196.90.100
66.196.90.178
66.196.72.91
66.196.90.82
66.196.90.216
66.196.90.215

Full list of IP addresses of INKTOMI Corporation( Yahoo )- 66.196.64.0 - 66.196.127.255

Source : http://www.whois.sc/66.196.65.0
Yahoo keeps shuffling their IPs across their Search engine, Information below cannot be 100% accurate but will give you an idea on the available Yahoo search domains, You can observe yahoo updates ( yahoo dance ) accross these domains.
Yahoo International Search IP addresses list:

http://216.109.117.133
http://216.109.117.134
http://216.109.117.135
http://216.109.117.137
http://216.109.117.138
http://216.109.117.139
http://216.109.117.140
http://216.109.117.152
http://66.218.71.233/

Yahoo UK and Ireland search IP address list:

http://216.109.117.141
http://216.109.117.142
http://216.109.117.143
http://216.109.117.144
http://216.109.117.145
http://216.109.117.146
http://216.109.117.147
http://216.109.117.148
http://216.109.117.149
http://216.109.117.150
http://216.109.117.151
http://216.109.117.160
http://216.109.117.161
http://216.109.117.162
http://216.109.117.163

Yahoo Canada search IP address list:

http://216.109.117.153
http://216.109.117.154
http://216.109.117.124/
http://216.109.117.125/