It is actually really cool how you can interactively move into regexes and refine your searches. I wonder why no other editor (as far as I know) have implemented something similar.
I like the way they handle this at the Sudbury Valley School (http://sudval.org). They essentially have realized that there is no objective way to measure a good teacher, so instead they take the darwinian approach. Every year all students (and staff) vote on which teachers thay want to keep, culling out the bad ones and just keeping the good ones.
They actually have had teachers so good that they have been re-elected every year for more than 40 years.
Actually the source is available and quite a few people have made it run on Linux. From what I hear it is still pretty unstable on Linux, but if a few gurus grabbed hold of it, it would probably quickly get up to speed.