Delver Lets you create
your own community of friends and searches their content.
Fasteagle is
a gateway to a lot of content, including Web 2 resources
Omgili lets you search
through various Web 2 resources, forums and bulletin boards.
Socialmention
This searches across blogs, twitter, bookmarks, events, images, news and
videos
Tusavvy Searches a
broad range of Web 2.0 material such as Pageflakes and Slideshare
I hope that you find this page to be of use to you: if so,
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Please note:
I haven't tried out all of these myself, and people
who I don't know have kindly made many recommendations as well.
Consequently you should exercise sensible caution
when trying these things out for yourself, and while I haven't included any
programs/utilities/resources that have any spyware or malware included in them
that I am aware of, I cannot take any responsibility for the utilities
themselves.
Your choice, your responsibility.
I can't answer questions on any of the products
themselves, as I am not associated with them in any way; if you have queries
you should direct them to the owner of that particular product.
I'm not including anything that isn't safe for work,
so don't ask for adult material to be included.