Hi there,
Just wanted to ask if for some reason you've missed my e-mails (and messages in the Opera Community thread), or you're not interested in the improvements I've done to the script? I see you mentioned that you don't use Opera and browse 4chan lately, however I'm interested in further improving fychan. Have a look here: http://my.opera.com/community/forums/findpost.pl?id=3543721
Your email got lost in the mix, actually, but I do see it now. And I haven't thought to check the Opera thread in ages. I thought I was subscribed to it for updates, but apparently not anymore! Glad you posted here to bring it to my attention.
I am using Opera lately though, and still browse 4chan occasionally when not involving myself in other things/projects. It's not so much that I'm disinterested in updating the script, since I still maintain it to ensure it works. It's just that Fychan pretty much just came to be as a result of features I wanted for the site, and whenever I come across the need for something else, I add that in as well. For example, I don't go to /b/ much anymore (mostly like r9k, wg, and g) so I personally haven't had to deal with thread bombs or anything very much these days.
That said, I've taken a peek at your code and tried out your latest version of the script. I can't test the thread bomb prevention at the moment, obviously. But I do think it and the other two additions are interesting. I personally like to see saged posts as well as everything else, so I wouldn't use that one myself, though I'm sure others would feel the same as you about it. But I can see how hiding small images would be handy, particularly in the case of spam. And shrinking the performance info header is nice.
Since you seem eager to introduce new features, then you're more than welcome to continue maintaining a patch and/or alternate edition, since you likely to visit 4chan more often than me (particularly, sections I don't frequent), and seem to have the skills to implement things you'd find handy. And I certainly appreciate you simply modifying the script header to include yourself and not just ripping it off or anything.
I don't know if I'll ever merge anything from them together, but I'll likely still continue to maintain my own version as I've been. Mostly fixes, but once in a while the urge to update it with a feature strikes, so who knows!