@Ron For export:

• Go to the web ->
• Click Posts ->
• Click Export.

From there you can see options for exporting your posts and uploads. This is the feature Manton is talking about improving with regard to replies.

Full search is unlikely to happen since it can be used as a tool fairly easily by bad actors, which is what happens on sites like Twitter. Right now you can search for your own posts on your Hosted site but replies aren't included; I think if replies can be included or given their own search then we would all be set, and it would be comprehensively covered if the improvements to the export feature was also included.