Just today, Tachikoma released a very simple install for his mastercoin-wallet that includes a simple send function.  It's for those running variants of ubuntu and he's looking for more people to test the install.  I installed on Ubuntu 13.10 with no issues.  Even if you're running Mac OS X or Windows, I feel its worthwhile to spin up a vm running Ubuntu to be able to use this wallet.

INSTRUCTIONS HERE

Edit - Just to clarify, the wallet and its simple send capability have been tested with both "Test" MSC and "Real" MSC quite a bit and in use for some time