Excellent idea for promoting the concept of an interactive web. This plugin is pretty basic, and sell implemented.
The new version is I think a step backward, though, as the icon is *much less distinct* than the old one. The green on white needs some clean black lines to clarify it. Right now it looks kind of like a green blob, whereas the old icon clearly looked like a pencil.
Works well, but location is poor--should be to the left of the bookmark and feed buttons, not to the right. Putting it on the right means it shoves these standard buttons aside whenever it appears which is counter-intuitive and interferes with user's learned behaviour.
the add-on just works fine. I tested it with my Windows XP Professional SP 3 and Firefox 3.0.10 (see Detail below). Tested in different Mediawikis (for instance Wikipedia), Dokuwikis and MoinMoin-Wikis.
(Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv:18.104.22.168) Gecko/2009042316 Firefox/3.0.10 (.NET CLR 3.5.30729)
It works very well with Iceweasel 3.0.9 over Debian Sid GNU/Linux. Tested with a few diferent wiki engines. It turns any wiki much easier to use, since you can edit every wiki in the same way. Just like with the universal RSS nutton.
Works fine here (Firefox 3.0.10 on Linux) and as expected - an addon you shouldn't miss if you are working with wikis a lot and no longer want to search for the edit button when you want to edit a page first - just click on the icon in the address bar and you can start writing.
The kind of thing that should probably be included by default in every browser these days. I like that it's not a regular toolbar button, but rather in the address bar, showing up and hiding itself automatically depending on whether or not a page is editable. Nice job, I hope it catches on.