Yeah! Olav Basoski rocks and the Marquee tool rocks... love using it to split regions, start playback from specified position, create 4 automation nodes... etc...
Although I never use the Marquee click zone enabled. Personally, I find it easier to set it as my Command-click tool and access it that way. (I'm so old-skool ;-)
Can't remember if I mentioned it before or not... but I wrote this article about the power of The Marquee tool last year that you might enjoy: