Just a quick post to mention I've uploaded the latest build to demo.mojoportal.com which has the new TinyMCE file browser and I've set it as the editor though of course someone may change it in site settings.
Would be interested in your feedback. One thing I noticed right away after trying it on the demo was that I need a way to get back to the root folder once you have drilled down to other folders. Will work on that tomorrow, for now you could dismiss the dialog and open it again.
Been working on this the past few days,it has not been without its challenges but its been kind of fun. Definitely this is going to be easier to evolve since the dialog itself is in .NET whereas in FCKeditor the dialogs are using a built in html frameset and all you can do is supply xml data.
Notice that content templates and content styles work too.
Admins get to browse/upload from /Data/Sites/[SiteID]/ but non admins can either browse/upload to /Data/Sites/[SiteID]/media/ or /Data/Sites/[SiteID]/userfiles/[UserGuid]/ depending on the permission settings I've added in site settings under Security > Permissions
Have a look and let me know what you think.