I’ve been using Panic’s Coda, everything-web-development tool, and agree with others, it is the bee’s knees. Not only is it a great web development tool, it’s five tools in one window: HTML Editor, CSS Editor, Terminal, FTP, Browser and Library.
One of the great features is saving your work on a “Site”. When you close Coda, all the tabs you had open while working on a particular site are saved- essentially saving your entire workspace. Split windows are really helpful as well. Another useful (unless you’re a ninja coder) is the Book Library integration. You have HTML, CSS, Javascript and PHP reference manuals built right in- which means you can find specific code in 3 nano seconds.
The software is at 1.0.3, so it’s very early days, but the software shows lots of promise. Ruby on Rails integration is (rumored) to be coming as well.
Jason Ball 
Panic’s Coda is a great solution when you want to do everything under one roof. The main goal is the opportunity to take you time.
I completely agree with your opinion.
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Verry nice post