Hi,
The App Engine team has been working hard for some time now to have
SSL for Custom Domains ready for launch. We have been running a
Trusted Tester Program for it for some months now with very positive
results.
I don't have a date to announce at this point as I would rather give
an definite date when I have one rather than an estimate which could
prove to be inaccurate. I can say though that we hope SSL will be
launched well before 2014.
Feel free to signup for the Trusted Tester Program if you have an
interest in trying SSL for Custom Domains in the meantime.
Trusted Tester Program Signup Form:
https://docs.google.com/a/google.com/spreadsheet/viewform?ndplr=1&pli=1&formkey=dHFoZFhlUTM1MUNpelFWcVJqcVAwckE6MQ#gid=0
Cayden Meyer
Product Manager, Google App Engine