For the record; I am a researcher working in the Semantic Web area, and I am primary developer of the system IkeWiki and the reasoning language Xcerpt. Since this discussion seems to pop up again and again on Slashdot, I didn't want to add comments to the same issues (trust, search) again. But your comment might add something new to the discussion:
Without knowing the details of your circumstances, it sounds like, maybe, the real point is that what you want is an object oriented database rather than relational one. RDF allows for much more of an object oriented design than a traditional RDBMS does.
In principle, you are right. But there is an important difference between RDF and Object Oriented Databases: while OO DBMS require that the data always conforms to a strict, pre-defined schema, RDF data is semi-structured and can be very flexibly extended. To give an example: in an OO DBMS, it is a problem if a person is defined only by first name and last name, and someone else wants to add a "friend" relationship to this person that is not foreseen in the schema. With RDF, this is not an issue: programs and repositories that were designed just for first name/last name will equally well work in the presence of a "friend" property. In a Web environment, chaotic as it is, this is a crucial property.