Wow, this group is pretty dead. You asked this back in November and
no one replied?

Technically, aggregators do not crawl sites. They hit feeds, and
feeds contain the content of your blog.

Look around different blogs and see what they are using as add
buttons. Besides the ones you mentioned, there is Google's two
readers, Rojo, tehcnorati, MyMSN, FeedLounge. Just Google "rss
readers."

--- In aggregators@yahoogroups.com, "roseysmall" <rcisneros@...>
wrote:
>
> Hi,
>
> I'm hoping you can help me. I'm needing to know what are the
> aggregators/readers used by the main news readers MyYahoo,
FeedReader,
> NetNewsWire, NewsGator, Bloglines, RSS Feeder.net, SAGE, etc.
>
> I'm looking into adding similar features on my website and would
like
> to research the ones that these sites use.
>
> Also, when the RSS reader for the above crawls the site, what
indexing
> do they use? Any knowledge of any or all of the above would be of
> great help.
>
> Thank you for any help you can provide.
>
> Rosa
>