I originally posted with on Twine, but thought it was worth repeating here. Twine is a new service that provides a way for users to track, find, and share what interests you with like minded people. Twine uses semantic web technology under the bonnet and exposes all of its data as linked data using RDF.
This RDF (along with other exposed RDF) is crawled an indexed by various semantic web search engines such as Sindice.
Not only have Sindice been busy indexing lots of RDF all over the semantic web – including Twine – but they have also provided a relatively simple query engine (not SPARQL). For the semantic web geeks/command line fans amongst you this provides a way to query Twine that is arguably quicker than Twine itself (though obviously not as easy or up to date).
For example in the advance query box the following:
* <http://www.radarnetworks.com/core#wasCreatedBy> <http://www.twine.com/user/gothwin>
will find all articles I created. The more complex query:
(* <http://www.radarnetworks.com/core#wasCreatedBy> <http://www.twine.com/user/gothwin> AND * <http://www.radarnetworks.com/2007/09/12/basic#tag> “semantic web”)
finds articles I created and tagged with “semantic web”.
Have a play :)