I would be happy to try to put together something for collection editing. I do currently have access to some Mac machines so in the next couple days I'll go try to see how Amber works (I've never used it). I know Tahoe never really did the job though.
I'm most unfamiliar with Myth III, but I'm guessing for collections, you want something for doing unit sprites, and that would apply to TFL and SB only right?
I think doing something that is cross platform (java maybe) for this might be the best thing. I personally hate running java apps, but in this particular case, I know the community has been lacking something useful for this sort of work on the PC side forever, and apparently people say Amber needs to be updated (why? what's wrong? etc, I have no idea, heheh).
I'm still pretty familiar with the file formats and stuff, but I'll pop up some old docs and read up on it over the next weeks if collections editor is what I end up doing. To be honest, its something I always wanted to do and since no one is getting close to release, why not.
My plan would be to read up, listen to suggestions, prioritize features, and get a skeleton set by December 18th. Then around December 21 or so (whatever the nearest weekday after 21st is) I would start working on weekdays until January 13 in small iterations to get those features done. At the end of those 20 days, whatever I have done will be open source, and hopefully it runs and is useful by then as well. Its short, but I'll (hopefully my girlfriend will have a job, hahah) have a good ten or so hours a day to split between that and practicing my Chinese writing (and God knows you can only do that so many hours a day without going nuts).
I think the project size just about fits the time frame. Now I just need to hear more about what people want to see.
Also, does Amber deal with mons tags and stuff too? I mean, isn't there something in the mons structure that reference which collections to use for different animation sequences for the sprites? Trying to remember this sort of stuff

(maybe I should just start looking up, hahah).
-Tim