Wow! Lots to talk about! Well...here goes my comments on some of the stuff discussed...
Edge...yeah, FCK is not the most flexible editor and certainly has its downsides. I personally use TinyMCE and find that it doesn’t muck up my code as much. Also, with all the editors, you should be able to use the link button and upload a PDF to a directory other than Images...the dropdown box in the resource browser should allow you to do that.
Speaking of which...the resource browser is perhaps the one thing that desperately needs to change. I’m in the process of testing a few scripts that, if they work out, might prove to be a nice, simple replacement that we can build upon. Perhaps the XStandard guys might have some say on it as well.
Now, in regards to XStandard, the only thing I’m greatly concerned about is the limitation of it being Windows only. I’m not very keen on spending alot of time integrating something that won’t work on a variety of different platforms and browsers. I think some standards need to be in place that allows an editor like XStandard to not only be "standards-compliant" in regards to the code it produces...but to also be "standards-compliant" from a platform/browser point of view, meaning that it will work with just about any browser out there on any OS. That’s been the goal from the gitgo with MODx...to make it as compatible as possible for a variety of platforms all the while making it easy to build standards-compliant website.
I’d be interested in working with XStandard provided that they’re aiming for a much wider audience than just Windows users. If they were to make a version of XStandard that would work with just about any browser and OS, I would gladly replace it with FCKEditor as the default editor...err...that is, provided it’s stable!