Hello Arthur,
for me term
cloud is strongly associated with distributed calculations. The idea which you probably has in mind more likely connected to another
buzz term
Web 2.0 (or maybe 3.0 already

).
To have your docs shared, you can already use one of existing services as Libe Folders from MS or GDrive, that uses your google account for this..
To make online version of Hippoedit I do not have a resources yet. And java script processig is still slow for efficent text parsing and thread processing yet. Also with new JS VMs.
For me is more important to keep HE community, that people can share their scripts or schemas. And this (partially) I would try to add in 1.50 as
Online Finctionality.
Best regards,
Alex.