User testing for semantic applicatons

I must say something
There are a lot of cool applications coming up, I try most of them , but they are new 
I am not sure what to expect exactly. What should it do? How do I know if there is an error, or if this is really the way
it should look? Little documentation, usability almost not taken into account etc.
Also I dont have all day, just a few minutes, a few clicks, then I lose interest, must move on
Now, the linked data below is quite straighforward intuitive interface (not bad in fact) although a few more explanations and how to's would be good. I also got an error when I tried it (different from the error below) not sure what to do next
All this to suggest a forum is created to handle usability of semantic applications, where we 'users' can
report our experiences and get some help in running/understanding the stuffs. I have a lot of feedback and user tests already running on semantic applications, may be most productive if handled collectively and shared, rather than just sent to the developers who are likely not to understand my problem anyway (we seem to speak different languages)
thoughts? 
cheers
PDM
 ----- Original Message ----- 
 From: Tim Berners-Lee 
 To: Hugh Glaser 
 Cc: Linking Open Data ; SW-forum Web ; Ian Millard 
 Sent: Wednesday, November 07, 2007 11:15 AM
 Subject: Re: Linked Data available
 Umm ,,, in http://nsf.rkbexplorer.com/data/person-6092a2a72319fc9437583fb2d04733ea I get
 Request for http://nsf.rkbexplorer.com/data/person-6092a2a72319fc9437583fb2d04733eaabout under the hood
 Label Request for http://nsf.rkbexplorer.com/data/person-6092a2a72319fc9437583fb2d04733ea
 Status 200
 StatusText OK
 Accept-ranges bytes
 Connection close
 Content-length 2005
 Content type text/xml
 Date 2007年11月07日 00:27:37 GMT
 Etag "7785ba-7d5-43e4bd0f48e00"
 Last-modified 2007年11月07日 00:27:36 GMT
 Server Apache/2.0.52 (Red Hat)
 Handler opt off 
 expandfetchSourceFetcher.XMLHandler
 Something funny about the XML: Line 2: doctype broken. Shoud not be a doctype.
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE rdf:RDF [
 <!ENTITY rdf 'http://www.w3.org/1999/02/22-rdf-syntax-ns#'>
 <!ENTITY rdfs 'http://www.w3.org/2000/01/rdf-schema#'>
 <!ENTITY owl 'http://www.w3.org/2002/07/owl#'>
 <!ENTITY akt 'http://www.aktors.org/ontology/portal#'>
 <!ENTITY akts 'http://www.aktors.org/ontology/support#'>
 <!ENTITY extn 'http://www.aktors.org/ontology/extension#'>
 <!ENTITY wiki 'http://resist.ecs.soton.ac.uk/wiki/'>
 <!ENTITY resist 'http://resist.ecs.soton.ac.uk/ontologies/resist#'>
 <!ENTITY resex 'http://resist.ecs.soton.ac.uk/ontologies/resilience-mechanisms#'>
 <!ENTITY courseware 'http://www.resist-noe.org/ontology/courseware#'>
 <!ENTITY dc 'http://purl.org/dc/elements/1.1/'>
 <!ENTITY dct 'http://purl.org/dc/terms/'>
 ]>
 <rdf:RDF
 xmlns:rdf="&rdf;"
 xmlns:rdfs="&rdfs;"
 xmlns:owl="&owl;"
 xmlns:akt="&akt;"
 xmlns:akts="&akts;"
 xmlns:extn="&extn;"
 xmlns:wiki="&wiki;"
 xmlns:resist="&resist;"
 xmlns:resex="&resex;"
 xmlns:courseware="&courseware;"
 xmlns:dc="&dc;"
 xmlns:dct="&dct;"
 >
 <owl:Ontology rdf:about="">
 [....]