予想はしていましたが...現時点では Passport 以外では動作しないそうです。
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引用
The Blackberry Blend application is actually just a really simple web browser with a simple UI on top. Think of it as a mini version of Google Chrome.
Essentially, it loads a webpage from your device that shows all your BBMs/contacts/calendar/etc. So, the issue here is not with Blackberry Blend browser, it's with what that browser is loading.
On your device, you have installed an application called: sys.fuse.bar. This application is the REAL Blend.
This application checks your hardware ID and PIN. It uses this to check if you are using a Passport. If you are not using a Passport, it simply exits. It doesn't run the web server on your device.
So when Blackberry Blend browser on your computer/tablet tries to load the webpage from your device that shows all this cool stuff, there's nothing there!
The error message hardcoded in for this event is that it is only available for RIM Internal Devices.