I don't know about you guys, but I actually USED Excadrill in the Pokemon VGC 2011 Championships. Sounds crazy, but there could be synergy with other Unova Pokemon.
Take my set for example:
Item: Razor Fang (I was too lazy to get a Choice Scarf, Choice Scarf is RECOMMENDED)
Ability: Sand Rush
EVS: 252 Atk/252 Spd/4 HP
- Rock Slide/Stone Edge
- Metal Claw
This set is the classic Excadrill. This set is usable in a multi-Pokemon VGC 2011 battle, which is slightly odd. Do I have to explain?
Partners in Doubles:
Ferrothorn can set up Sandstorm in VGC 2011 rules, but you can use Tyranitar instead for normal doubles. Electross and Hydreigon can be used well with Earthquake.
BTW, I actually lost with this Excadrill, mainly because I didn't have time to EV train and breed for natures.