It looks like no SQL CE local database access on the phone. If you listen to the live.visitmix.com "Daily Show" 5pm webcast interview, the only way to use a db locally from Silverlight is to 1) find a database that can run in isolated storage (Not SQL CE).
The example they gave was a codeplex project called SilverDB which under the covers is LINQ accessing an XML file. It sounds a little rickety to me. I hope they come up with a better, more official solution. I'd have trouble explaining how secure that data
is or how performant. For me, it's a real dissapointment. I expect Microsoft will get a lot of feedback once people realize the situation. I hope Microsoft is remedying this as we speak. If you need secure, local database access for your app to run, please
let Microsoft know.
And thanks to the guys, for answering my question. I am really disappointed with the answer. There are some great things in the new platform, but I think local database access is the platform's Achilles heel.
I'll be able to write some good apps for it, just not real line of businesss, vertical market kind of stuff. Is there any advice for the appropriate platform for apps that cannot operate efficiently without a local database?