Ahh, Mike, good to hear from you.
I am using a script. The script(s) still works. It loads great. I do see the error 99999 still but the data is uploaded as expected. I am just testing due to some other non Online issues, so I am investigating again to see if my error 999999 were still there, if a fix was in place. These scripts run late at night, normally, so as I investigate my other issues, I get to run them during the day to see if anything has changed, and in that regard, I still encounter the issues. I do imagine that 10.1 will have something there for SharePackages. Thanks for letting me know about the async fixes.