The v1.7 patch is now available on Tabula Rasa's test server. There is one note of caution for potential testers, however:

1.7 is now on the Public Test Server. Please be advised, if you are patching from version 1.6.6.1 you may get an error message and won't be able to patch to 1.7. We hope to have this issue resolved shortly.

As soon as a full list of fixes and improvements is available, we'll post it for your perusal.