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1) custom error pages: Google wants you to deliver error pages as error pages (404s). If you are trying to deliver targeted content to the user when a page can't be found, he asked that it still be done with a 404.
2) as previously posted by GoogleGuy, hide session ids in URLs from Googlebot.
3) expired domains: Google will "soon" be filtering expired domains from its index and link calculations [no further elaboration]
4) when asked about the significance of ODP/dmoz listings to Google, Daniel replied that "links from directories that people still use" have significance to Google. [he did not expand on this. the question was about ODP specifically but he did not refer directly to ODP in his answer.]
5) an audience member suggested that webmasters would be willing to pay to find out whether a site had been banned, Daniel replied that Google would love to be able to respond to these kinds of inquiries and that they are "working very hard" to do so. "When we find a fair way to do it, we will."
6) use of applications that send automated queries (eg, WebPosition) is against their terms of service. Using it may result in them blocking your searching. It won't usually affect your rank.
7) he mentioned in passing that they crawl dynamic sites more slowly than static pages so that they don't overwhelm the databases behind them [for what that's worth]
As I said, his comments were crisp and carefully worded. He did not elaborate beyond what I have noted. I have done my best to capture the gist of these comments. If you heard something different or differently, add it here.
Have at it!
I don't quite grok what the above means. An expired domain will naturally not resolve. Thus, these are already removed in the next index because Googlebot won't be able to spider them. Or, do perhaps they mean they will automatically remove them between index updates as soon as they know it is expired? I'll presume that the link calculations part is that if some page that happens not to be updated in many years has 10 links on it, and now 9 are long dead yet one still works, all PR will be transferred to the one that does work.
>4) when asked about the significance of ODP/dmoz listings to Google, Daniel replied that "links from directories that people still use" have significance to Google. [he did not expand on this. the question was about ODP specifically but he did not refer directly to ODP in his answer.]
Obviously Google will continue to count the ODP. Otherwise, they'd be disregarding links from their *own* directory because that is just an ODP mirror. I wonder if perhaps the above means Google is planning on ignoring in the future a lot of small directories that the don't consider important?
This is pure speculation, but I took it to mean that they are addressing the problem of expired domains displaying or being redirected to irrelevant content? This wouldn't necessarily get detected in the crawl/update cycle since there is still a site resolving at the domain. And there are still links to it.
They would have to tackle this algorithmically (I like the sound of that!). Perhaps they could compare link text/context and the actual content of the page, using domain expiration lists as a seed for this comparison. Or maybe there will be an anti-freshbot / death-bot, crawling expired-then-purchased domains looking for irrelevance?
As I said, Google didn't elaborate. This is just my own speculation.
when asked about the significance of ODP/dmoz listings to Google, Daniel replied that "links from directories that people still use" have significance to Google. [he did not expand on this. the question was about ODP specifically but he did not refer directly to ODP in his answer.]
That was actually my question (is it ok if I take credit), and I am still kinda disappointed with the answer. Does that mean that if nobody is using DMOZ that we shouldn't really care about.
What I got from the conference and talking with the search engine people, including the Google reps, was that you won't be blocked for using a ranking software unless you "abuse" it. I think what they meant was excessive searching on the index. The index doesn't update but once a month, so ranking your site more than once or twice could be considered abuse.
When I spoke with Daniel, he mentioned that users could sign up for the API program if they were worried about being blocked from the search engine. I didn't think many people would be interested in doing that. Plus, that still doesn't guarantee you wont get blocked.
If you're afraid of getting banned or blocked, you can use a dial-up account to rank your web site and never search for your url. Then you really don't have anything to worry about.
I thought this was pretty important since the duplicate content in this case is actually being generated by Fast, not the publisher.