Backend Content Management for Flash Blogs

Create a flash blog with the ability to update from mobile which includes images and latest update. link it with twitter and facebook pages etc. it should have the ability to comment and also the possibility to delete them. want it to be content editable such that it could even add more webpages and subpages. maybe something similar to [login to view URL] i want it too have some pages with username and password, so that all cannot view those pages.