With your dev license, you get access to RIM's signing service. You can distribute code any way you like, but you have to run it through the signing servers before it will run on a device. To shut you down, they just disable your account. Code that is already signed will run forever.
That's not actually true. You can sign an app without going through RIM; they provide code that does it. (Unlike iPhone, you can just download an app from anywhere on the Internet and install it, as long as somebody has signed it with any key at all.) However, you can't use their push servers without a RIM-signed app, which has apparently been revoked in this case.
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I'm not sure how submitting a BB app works
With your dev license, you get access to RIM's signing service. You can distribute code any way you like, but you have to run it through the signing servers before it will run on a device. To shut you down, they just disable your account. Code that is already signed will run forever.
That's not actually true. You can sign an app without going through RIM; they provide code that does it. (Unlike iPhone, you can just download an app from anywhere on the Internet and install it, as long as somebody has signed it with any key at all.) However, you can't use their push servers without a RIM-signed app, which has apparently been revoked in this case.
Right, I forgot, there is a subset of the API that can be used by unsigned code but it's extremely limited.. just UI stuff I think.