Facebook Canvas Application - send updates to members who installed the application

I want to be able to send updates (in news activity) to users who have installed the canvas application - without posting on their wall or sending them Facebook messages.

One way of doing this could be through the application wall - where I post all my application updates. But these updates would only show up in the news activity feed if a user has liked the application wall. So is there a way of auto liking the application wall when someone installs the ap开发者_StackOverflow社区plication?

Or are there any other ways to achieve this?

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There is currently no way to programmatically like something. What you may be able to do is ask for their email and then email them when there is news for them.

Alternatively, if you have the publish_stream permission you can send private wall messages to them.