Fire Charge

A Fire Charge is an item that was released in the 12w04 Snapshot, which can be used similar to flint and steel. It is essentially an upgrade to the flint and steel, as the fire spreads faster. It can be crafted with coal, gunpowder, and Blaze powder in any pattern:

When a fire charge is launched from a dispenser, it acts like a Ghast's fireball and lights the area it touches on fire. Dispensers tend to fire the balls up. They are not affected by gravity, so they will continue on a path out of sight forever until coming into contact with anything. This is pretty interesting in multiplayer PvP, since you can use this item as a cannon salvo.