If your installation of MAMP does not show php errors, you may need to change a setting in your php.ini file. You can find this file in MAMP > conf > php5 > php.ini
Look for “display_errors = Off” and change to “display_errors = On”
After that you should restart your apache and mysql servers.
Web Browser Elements, image courtesy of Designer Toolbox.com
I found some freebies on the web- browser graphics or elements for wire frames or web design comps.
Form elements for all browsers and operating systems: http://www.designerstoolbox.com/designresources/elements/
Vectortuts Freebie Vector Chrome for firefox on mac: http://vectortuts.com/articles/news/vectortuts-freebie-vector-pack-browser-screens-and-website-elements/
OmniGraffle Stencils: http://www.graffletopia.com/
Yahoo Developer Stencil Kit: http://developer.yahoo.com/ypatterns/wireframes/
Related articles [Updated 12-23-08]:
Coda currently does not have a way to export or save sites like you can using Transmit. But there is a way to save your coda site settings if you need to migrate your site data from one computer to another. You will need to save a file from your preferences folder.
“in order to not have to reenter all passwords.. You’ll need to copy over the keychain aswell.. You will find it at the same place (the library folder) but in a folder called “keychains”. You don’t need the one with “meta” in its name.”
“you will come to a hidden folder within your users folder (NOT the libraryfolder which also happens to contain a preferences folder”
So make sure that you are looking under the Library folder that is within your Home folder: 
This info was originally found at: Google Groups | Coda User
Thanks everyone for your comments and help with this topic! I have updated the instructions with your inputs!