Today I saw something in Seaside that gave me one of those 'Dude, that so totally rocks' moments.
There's an innocent toolbar option in Seaside called 'Toggle Halos' that switches on a visual representation of the components on a page, with some icons for each one. One of the icons looks like a spanner (US: wrench), and when clicked on, shows you the code for the component in your browser, and lets you edit it!
Oh yes. Welcome to really rapid application development.
Dude. That's what I like to hear.
Apart from the occasional quick fix to a live site, I don't tend to use that feature much for development, but what I use it for all the time is for getting my bearings in a complex codebase. When you're deep inside an application that someone else (like, say, yourself two years ago) wrote, there's nothing quite like being able to point at the screen and say "ok, now show me the code that renders that bit of the page".
(And in case anyone's wondering what halos look like, Ian Prince has a great reflexive screenshot here).
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