Any solution for a multi camera HD setup over a switcher?
I know it's possible ove HD-SDI but what about intercom and camera setups?

From what i've been told, the answer is no, the OB company i work for just completely upgraded our gear, and moved to Panasonic SPX800 units with Triax backs and basestations in our truck. We looked at the sony path, the xd path and there are no triax backs or base stations that will fit the XDcam cameras that we are aware of. We actually got the last few digital DVCPRO triax base stations that were ever made. Apart from their actual studio cameras, the only sony ENG cameras that you can Triax backs for are the DSR570s, and even then, im pretty sure you can get base stations for them anymore.

The OB market is currently waiting(we as far as we are aware, we havent been looking for 6 months since we got our gear) for new Technology due to large amount of Lead that are put in the base stations - polution yarda yarda yarda.

However like i said, we havent been looking at gear for about 6 months since our new gear arrived... there might be been a development.

Well, there is a solution. called Camplex. I saw it working @ the NAB. GlassFibre and a triax cable is all you need to transport everything, from iris control, intercom, power to HD SDI. CCU via the Sony remotes.

http://www.camplex.com/pages/301hd.html
http://www.camplex.com/pages/301c.html

i stand corrected. :)