Crusader Strike

Crusader Strike is a core paladin ability. It is an instant weapon strike that grants a charge of holy power, can activate procs, and counts as a single-target melee attack for purposes of the paladin's active seal. This ability is a melee special ability, not an actual spell, and therefore it is not affected by silence or spell school locking abilities (the others being Divine Storm and Hammer of the Righteous). Like other strikes, however, it does not work with any disarm effects on. All damage dealt by the attack is physical.

Cataclysm
In Cataclysm, Crusader Strike will be a core ability for all paladins, gained at level 1. Retribution will get a talent that causes haste effects to lower the cooldown.