Support for the Data Hub LOD Datasets

Dear list members,

I'm in the process of compiling a dataset on datahub.io and I'd like to 
assess its compliance with LOD guidelines 
<https://www.w3.org/wiki/TaskForces/CommunityProjects/LinkingOpenData/DataSets/CKANmetainformation>. 

It is advised to use the dataset validation 
<http://validator.lod-cloud.net/index.php>, however I'm not sure whether 
this portal is maintained: the search form keeps returning the same page 
about compliance levels, but does not give data about any specific 
dataset, including those already listed.

The validator does not mention any contact information; would you know 
to whom I should report this issue?
Does anyone have experience in using it, and more generally in 
publishing a dataset in the LOD?

Thanks for your help,
    Franck.