I wanted to see a tech-tree-style layout of all the units in Civ V showing upgrade paths, era's, etc. Since I couldn't find one I made one myself and thought I'd post it here in case anyone's interested.
[Edit] Added in the scout and the unique upgrade paths from Ancient Ruins
[Edit2] Added in all the upgrade paths for Ancient Ruins according to CIV5Units.xml and also attached the vsd in the rar in case anyone wants it
[Edit3] October 27, 2010 - Updated to 1.0.0.621
- Added Mongolian Keshik
- Changed Chariot Archer, War Chariot, War Elephant, and Camel Archer from the Mounted to Archery unit type.
[Edit] Added in the scout and the unique upgrade paths from Ancient Ruins
[Edit2] Added in all the upgrade paths for Ancient Ruins according to CIV5Units.xml and also attached the vsd in the rar in case anyone wants it

[Edit3] October 27, 2010 - Updated to 1.0.0.621
- Added Mongolian Keshik
- Changed Chariot Archer, War Chariot, War Elephant, and Camel Archer from the Mounted to Archery unit type.