rescendent - 11:55 pm on Apr 5, 2005 (gmt 0)

I'm going to have to hunt down my reference, (not sure which bots etc.) but I have read the suggestion some search engine bots will queue their indexing on ip address rather than domain name so as not to hammer the server the site is on. (Makes sense)

However if you are sharing a server/cluster with 2k-20k sites all on the same ip, your pages indexing will be queued with all of theirs. (As if there were 20k bots grabbing pages from you server it may just interfere with your regular traffic somewhat)

Possibly inflated figures but you get the idea. So I'd imagine you'd get indexed slower. Probablly not by really enough to worry about though...