I was under the impression that the new editor is already in Pharo 3? I don't remember all the details, but I think I at one point saw some rich editing classes while browsing packages in my image. It implemented line-numbers and other niceties. But it may have been something I installed from squeaksource. Anyway, I only recently started playing with Pharo 3, and noticed many improvements to editor, but didn't have the time to investigate so I just assumed it's already done.

I would really like to contribute somehow to Pharo development, it's absolutely fantastic piece of software. I went through tickets on official bug-tracker, but there are many of them and it's hard to tell which are important and which are being worked on. (BTW: Komitter is a very nice idea!) I didn't write to the mailing list, because I don't have (especially lately) enough time to do anything substantial; I just wanted to get some simple regression (for example) which I could fix in a couple of minutes/half an hour. The section of bug tracker with tickets like this would be a great help. Otherwise I'll certainly try to get involved more once I have a bit more free time :)