I was helping a MaidSafeCoiner who had heard that Mastercoin Foundation development focus was being moved away from the Masterchest wallet. I wrote to their lead wallet developer and received the following update, I thought it may be of interest:
"The Masterchest desktop wallet is being depreciated (in that no new features will be released for it).
The reason behind this move is because we are currently focusing almost all development efforts into Mastercore.
A bitcoin-qt based Mastercoin wallet which will takeover as the desktop option (currently slated for initial release August 1st). Masterchest will get critical updates/patches in the interim to keep it in consensus until the new software is released If you can help start spreading the word that would be best. Please make sure anyone who is running Masterchest checks https://masterchest.info/wallet.aspx and the Mastercoin blog/reddit for posts about critical updates. Once Mastercore is ready there will be documentation for the move. Omni is also a good alternative for the web based management. All the user needs to start using Omni is the private key for their maidsafe address. After that they create/login to omni and add/import their private key into their wallet and the maidsafe will become available for use."