I switched in 2009 after the vB4 release and their interpretation of 'Gold'. I didn't see any perspective for a better ending and unfortunately (competition is always a good thing for customers, but they aren't anymore) I was right. vB5 is a disaster and won't be a competitive product in near time. It only has a chance if every other vendor will stop working on their own product.
I've never had a bad experience with their support, though. I bought my license on the Germany sister site and they have been always helpful. Even after they had been kicked for vB5.
I switched in 2009 after they had released vB4 in a incredibly bad condition. I didn't see any perspective for the software and unfortunately I was right. vB5 Connect has less features than vB4 and is in a similar bad shape than vB4 was at release.
So simple: vB5 has no perspective and doubt it ever will.
You can edit the name in applications -> Applications Public title.
Or you can add a phrase core/public_global appname _display_title where appname is the name of the app. So for forums it would be forums_display_title, for Nexus nexus_display_title and so on. With the phrases you can add translations for more than one language.
IP.Nexus yes, IP.Content can't as you define the content which is displayed. For your information: IP.Content ist not a CMS like Joomla or vBulletin has. Try the demo and take a look or you will be probably disappointed!