@pixii I'm afraid that there is not a thing such a hub to directly make searches into different b2evolution sites.

I think I remember a list of connected / active sites information taken from the pings sent to b2evonet on each new post published from those sites where that feature is enabled, but now I can't find that info in the page (maybe I just dreamed all the thing :D).

Is there any particular use that you would like to give to such a feature like that?

Not really any particular use, just interested in reading/sharing blogs based off of Categories/Topics and what have you.

Although the "Site Showcase" Section is nice, it's still not really ideal for finding "every listing about Video Game Blogs" for example. If that makes sense?

Makes sense.

We used to have an embrio of something like this indeed, as @mgsolipa mentioned, but it was spammed to death by peopel promoting Porn, Pills, Casino and what not... It was taken way too much time to maintain clean and we decided that our primary mission was not to maintain an aggregator but to make the best possible Blog/CMS software instead ;)

Ah I gotcha. Yea, I could see how that could get out of hand. Stinks that people abuse the system and ruin it for the rest of us >.< Oh well, no worries! Thanks for the info!