@SPC_ORG @DougHemminger on #SharePointApp development

No more authohosted app!
MS announced that the Office 365 Autohosted Apps Preview program will end on June 30, 2014.
So now we have 2 left: SharePoint-hosted, provider-hosted.

App model to solve security issues of full trust solutions.

When to use the App Model
 -SPOnline
 -Strong JavaScript\Client side developers

a nice thing to know: Office dev center has Showcase: Contoso incubation search app

Other recommended read: 

Apps for SharePoint compared with SharePoint solutions

Note:
On Anonymous access for App - How to: Create apps for SharePoint that can be used by anonymous users

Sync in app web not possible?

@vgrem  referenced me (didn't help) to Sync button for Document Library created with custom list definition in order to resolve the issue I am having.
Here is an issue:

I need to have a library in SharePoint-hosted app that can be synced via OneDrive Sync Tool in SpOnline.
as of 4/29/2014, I can't make it happen:

The sharepoint-hosted app has a library. Once deployed (SPOnline), I see the instance. 

The sync button is disabled on the doc panel...

I have checked the  Sync button for Document Library created with custom list definition and did as prescribed, but the issue remains. 

Here what I did as the article said:

1. Checked the feature id that delivers the list and list instance:

FeatureId="7ea48d05-ba84-4553-b5ab-0d02118c86f4"

 2. Modified element.xml:

in the list template:

• changed the type to 101;
• added FeatureId="7ea48d05-ba84-4553-b5ab-0d02118c86f4";
• changed DocumentTemplate to "10000".

in the list instance template:

• changed the type to 101;
• added FeatureId="7ea48d05-ba84-4553-b5ab-0d02118c86f4".

 After that, re-deployed to SharePoint Online:
The sync button is still disabled

If somebody knows solution, please help me out!
Thanks

P.S.
The same wsp from App deployed as a sandboxed solution on the same site collection does allow me to sync docs from the lib

P.S.S.

And here is almost official response: NO, APP WEB LIB WON'T SYNC

#SP24 : SP Solutions vs Apss

A quick visual aid from one of the speaker in #SP24.
How do you choose between SP Solutions and SP Apps?

Error occurred in deployment step 'Install App for SharePoint': packagePath

In case you have started SharePoint 2013 Apps Development and you use remote deployment (How to Deploy Apps Remotely to the Office 365 Preview) , you might experience a following error when you click "Deploy":
Error occurred in deployment step 'Install App for SharePoint': packagePath

To resolve the issue:
Make sure that project name and package name are the same.
Clean the project after renaming, and then deploy

Explanation:
Deploy triggers some MS Build actions and one of them at one point is trying to find a package name based on the project name in the folder: bin\[Release\Publish]\app.publish
But since you package has a different name than the project, the action couldn't find a package to deploy.

I would prefer to have more descriptive error in VS with the specific path though....Now, after we discover the reason of failure behind , it's much clearer what "Error occurred in deployment step 'Install App for SharePoint': packagePath" means.