Decrypt Remote Desktop Mobile password
I found the article about decrypting saved RDP passwords at http://www.jaysonragasa.net/post/EncryptDecrypt-RDP-Password.aspx and http://www.remkoweijnen.nl/blog/2008/03/02/how-rdp-passwords-are-encrypted-2/.
Fortunately, decrypting a saved Windows Mobile password is not as complicated as on Desktop PCs. There is no entropy (???) etc.