No way to join accounts, again. I can not understand why this kind of basic functionality is missing. EDIT: Just to clarify, I mean there is now way to connect a Google Apps account to another Google account so that they can share certain services. I sort of understand why they think they don't need it for email, but having two separate G+ account is completely superfluous, thanks to the Circles system.
Wait, what do you mean? Right now I have two Gmail tabs open at the same time, one personal, one work. I'm using the multiple accounts feature: https://accounts.google.com/b/0/MultipleSessions You need to keep the accounts separate because enterprise apps have different privacy issues; your employer in enterprise settings is specifically given the ability to see all of your data. Would you really want them seeing you…
This is a deal-breaker for most enterprises, as is the current requirement of public profiles.