With this post I'm sorry to announce the end of my two applications: ShareFolder Explorer and MegaTorrent. From here I want to thank all people wrote me positive and negative comments, and I hope the two applications have been helpful.
Probably, I don't think I will dedicate more time to Windows Phone, I hope the platform takeoff in a near future, but with the poor support (marketing especially) received from the manufacturer, I think is not going to be in short-medium term.
Both applications will be removed from the store on 31th Aug., while you can download both for free. If you are a developer and are looking for a library to use network shares, you can take a look of my jCifs port at https://github.com/zinkpad/SharpCifs
One more time again, many thanks to all!