The problem with ASP.NET MVC - "spaghetti code"

I apologise in advance if this post seems slightly incoherent - I write this whilst on a train, and its quite a bumpy ride.  Also, another disclaimer - the code you're about to see will be soon heavily refactored and improved; don't expect it in this state to be amazing!  For one, truncating the post content will be moved to the model level, and the post mark-up will be moved to a user control.