This. They must have really backed themselves into a corner somehow when they were building Google Profiles. I. Will. Not. Open. A. Secondary. Account. Ever.
I had my Gmail account way before they even introduced Apps accounts, let alone before I migrated my company mail to Google Apps.
So, let me tell you this: You made a good decision. While dealing with multiple accounts on the desktop is annoying, it's utterly terrible on mobile because their slow-as-hell multiple sign-in feature doesn't work on mobile.
Yeah. While on the desktop it's annoying but not that much of a hassle to sign out and back in, it's terrible to having to do that on a phone - especially once you enable two factor authentication.
Before they "fixed" (note the quotes) the apps accounts so they can use (not quite) all of google's services, I could at least stay signed in with both accounts. Not any more.
This ended up with me having two browsers, one for plus, reader and all other google services I had much prior to creating the apps account and one for reading mail in gmail.
Yes. I could migrate to an Android phone. Been there. Done that. Multiple times. I really tried. Over two years on and off.
While Gmail works much better, everything else is just full of paper cuts and annoys the hell out of me over time, so I'd rather stay with the iPhone.
So. If anybody from Google is seeing this, I admit it freely, rant: Please, please, please, please fix this.
At least give us multiple sing-on on your mobile apps, at best let us stay signed in with multiple accounts at once or, alternatively, give us the Android Gmail app on iOS (it's not much more than a website anyways).
What's worse is that since "fixing" the apps accounts I now have different services signed up with both my apps and (empty, useless) gmail account. I have to play a guessing game and hope I'm logged in to the right one to find what I need.
Part of the reason I would imagine is the SLA they have with paying customers:
> 99.9% uptime guarantee SLA and 24x7 support"
I would imagine they will only open up new services once they believe they can meet the SLA on them. As a paying apps customer I am miffed on how long this takes though.
Apparently, no-one had thought to let Google know that this is a needed feature (despite Googlers posting once in a blue-moon about this issue over on the discussion groups).
I've starred it fine with my google apps account. You do have to create a 'code' account first though IIRC. Similar to how you have to create a 'Blogger' account despite them using a Google Account.
I thought this trend would have stopped when they integrated google apps with regular google services. I guess not. I still have yet to try G+ because of this.
I think they will eventually have this option. Considering how important G+ is for Google, I don't see how they can keep the Apps folks in a ghetto much longer.
The big question is, whether they integrate circles in a special Apps-specific way (ie, default circle, private shared circles -- assuming "shared circles" are upcoming, etc)... some Apps domain owners (big orgs, gov) may NOT WANT G+ inclusion for their flock.
I went and deleted my google apps for my domain account and just forwarded my email to my gmail account because of this. It was just too painful having two accounts.