How do I access this activity log information programmatically with Ruby (this is the Activity Window from Safari)? Can I use Mechanize to spit out all this information (duration, size, address, etc.) in XML, or is this already stored somewhere on my computer?
If you're talking about your Ruby on Rails logs they are located in
RAILS_ROOT/log
And then each is broken out by environment, you should have one log each for development, production, etc.
If you're on windows you might want to look at RubyLogParser which wraps Microsoft's Log Parser. Personally, I'd grep the heck out log to extract what information I wanted and then use ruby for higher level analysis and display of that data.