Web Development for the Mac is starting to really take shape with a number of editors available now. Coda appears to be a neat idea to develop everything in one location. It can handle multiple sites, FTP, collaboration, Stylesheets, and a terminal inside the editor (think rails).
Coda can handle Mutliple Sites
The Coda editor has syntax highlighting, as expected (looks similar to Textpad).
The Coda editor has a nice built-in preview.
The built-in terminal is a good idea for developing Rails applications.
