Currently running 10.7.2 on a late 2008 MacBook Pro.

For development I abandoned MacPorts because it required administrator access. As of late 2010 I use Homebrew to install extra packages and rvm (using a Homebrew install of Ruby, not the OS X one) to provide multiple rubies.

Other useful tools:

• MacVim (version 7.3, installed in ~/Applications
• SuperDuper (version 2.6.2 (v87), installed in Applications, registered to me)
• Caffeine (version 1.1.1, installed in ~/Applications, login item)
• QuickSilver (β61 (3900), installed in Applications, login item) Google group
• Growl (version 1.2.1, GrowlHelperApp and GrowlTunes login items)
• Pomodoro (version 0.31, installed in ~/Applications, login item)
• Istat Menus (version 3.10, Date & Time and Battery in menu bar, registered)