Dunno if anyone's noticed, or if it's deliberate, or if they just haven't got round to it yet, but http://www.msgplus.com and http://www.msgpluslive.com are still showing the old (MP!L) site, although version 5 is available to download from them...

Yes, a few people noticed. Reported it on the beta forum too. It might have been intentional since last I heard they were trying to optimize the speed of the site, so maybe they didn't want too much load on the new site while issues were still being worked out. But as far as I can tell the speed seems decent now, time to bring in all the visitors.

The same issue with all the localized domain btw (msgpluslive.nl etc).

They should really set up 301 redirects rather than just removing those domains. They'll lose a hell of a lot of link juice which that definitely already have from places like CNET.