That's a whole seperate issue.
I felt ripped off that third party devs aren't allowed in,
because third party Apps could make it a lot more than it is.
So you bought an AppleTV without doing even an ounce of research? Any review would tell you that 3rd party apps are not allowed yet (and may never be). Sounds more like your anger and disappointment should be aimed at yourself and not the AppleTV. Now you just sound really whiny.
I drive a Ford Escape w/ 1.6L engine, I'm really pissed off at Ford because it doesn't do 0-60 in 3 seconds.... /sarcasm
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Apps don't have access to ATV, only through media player framework.
The only way an App works, is it plays media through it.
The reason for any App issues through the HDMI adapter is likely
because they haven't handled an external display, or it's rotation properly, or at all..
P.S. Just about any of my apps that don't have Airplay support, do support Airplay Mirroring to my AppleTV. Just saying....