Silverlight is attempting this in Silverlight 4.0, where authorization will give you access to a users ‘MyDocuments’ – if run as an ‘out of browser’ (offline) application.

Ok, that said… how do we do what we need too ? First, I think we look at what I’d consider to be the ‘prototype’, ie. let’s say Google Docs. Alternatively, I’d consider some form of partitioning of local drive space – similiar again to what Silverlight provides with it’s storage.

Tread lightly on the idea of accessing a users file system – the developers think that is cool… but users I know that aren’t that technical will be in a world of hurt.