Is this a spider?

[Thantos]

Got a bunch of guest (over a full page) all from this range of IPs

rgName:    Inktomi Corporation
OrgID:      INKT
Address:    4100 East Third Avenue
City:       Foster City
StateProv:  CA
PostalCode: 94404
Country:    US

NetRange:   68.142.192.0 - 68.142.255.255
CIDR:       68.142.192.0/18
NetName:    INKTOMI-BLK-4
NetHandle:  NET-68-142-192-0-1
Parent:     NET-68-0-0-0-0
NetType:    Direct Allocation
NameServer: NS1.YAHOO.COM
NameServer: NS2.YAHOO.COM
NameServer: NS3.YAHOO.COM
NameServer: NS4.YAHOO.COM
NameServer: NS5.YAHOO.COM
Comment:    For general abuse contact [email protected].
Comment:    For Web Crawler questions please visit
Comment:    http://help.yahoo.com/help/us/ysearch/slurp/
RegDate:    2004-03-24
Updated:    2005-02-18

AbuseHandle: NA258-ARIN
AbuseName:   Netblock Admin
AbusePhone:  +1-408-349-3300
AbuseEmail:  [email protected]

OrgTechHandle: ZI35-ARIN
OrgTechName:   Inktomi Corporation
OrgTechPhone:  +1-650-653-2800
OrgTechEmail:  [email protected]

# ARIN WHOIS database, last updated 2005-05-03 20:17
# Enter ? for additional hints on searching ARIN's WHOIS database

[[Unknown]]

Yahoo! Slurp, methinks.

-[Unknown]

[Thantos]

Dang Yahoo!

Thanks

[maida]

Thanks for this thread. 

I was getting worried because I have 5 pages of guest accesses with the 74.6.60-70.* IP range which gave me this when I tracked it:

OrgName:    Inktomi Corporation
OrgID:      INKT
Address:    701 First Ave
City:       Sunnyvale
StateProv:  CA
PostalCode: 94089
Country:    US

NetRange:   74.6.0.0 - 74.6.255.255
CIDR:       74.6.0.0/16
NetName:    INKTOMI-BLK-6
NetHandle:  NET-74-6-0-0-1
Parent:     NET-74-0-0-0-0
NetType:    Direct Allocation
NameServer: NS1.YAHOO.COM
NameServer: NS2.YAHOO.COM
NameServer: NS3.YAHOO.COM
NameServer: NS4.YAHOO.COM
NameServer: NS5.YAHOO.COM
Comment:   
RegDate:    2006-02-13
Updated:    2006-02-13

Because of all the accesses, now my stats say:
Most Online:     237 - Today at 07:49:49 PM

I wish I could reset that somehow

[SleePy]

maida,
Is this still a problem or where you able to resolve this issue?

You can contact Yahoo and they can give your information on how to slow down the bots on your website.
From what I know yahoo seems to like to crawl sites to fast. I don't know if they have something similar to google where you can slow it down but again Yahoo Support should be able to provide you with that information.