Tim Gregson, aka ‘Beatle’ on the numerous FS forums, has released the first public beta of his (private) new Managed SimConnect Client SDK. This SDK can be used to build managed SimConnect clients, both desktop (Console, WinForm, WPF) and web (Silverlight). This is not an add-on to play with, but an SDK (Software Development Kit) that will let you develop things for FSX. He also states that Microsoft has nothing to do with this product. An extensive ‘readme’ is included in the download file, which you can get from Tim’s blog, here.