I'm sorry if my tongue in cheek hunour didnt go down well with you, its just that after i mentioned that i had already looked through the showcase page, to be reffered to it in that cavalier fashion, made me a little narked and i let that remark slip through.
Anyway i really appreciate your taking the time to reply and to be a little more clear i have been researching a particular project of mine for about 2 years now and was on the verge of buying the joomla module jomsocial when i came accros multisite for WP. I am looking to build a portal site which allows the sub-sites to have their own separate forums, audio/video plugins, newsletters and administrator emails. I will set the layout of these subsites and then leave it to the administrators to populate there own subsite and build their own communities.
I know most if not all of this possible on jomsocial but after 3 years of developing joomla sites i am a little concerned that joomla is too clunky and slow to handle a large number of subsite. I know WP is much more stable but i am ot impressed with the sites i've seen so far in terms of their functionality.
The closest example ive seen in the showcase is teachforus.org which is more of a blog site than anything else. The Greek school site blogs.sch.gr seems a little more like what i want but since i dont understand the greek i havent been able to explore the site much.
Thanks again for your time