Thanks for the suggestion! I did a quick test of Panaroo. It's very easy to use, very straightforward. You may be right, even my grandmother could do it.
I don't see anything specifically mentioning RICOH THETA support, which is too bad, but I tested it with a THETA image an it worked just fine. There is a slight latency when uploading images. The first time I uploaded the THETA image there was a big black side to it. But this disappeared quickly as I looked through it.
It's added to the list. Please point to the list as a reference in social media or any other promotional efforts you make.