Warcraft Recruit A Friend Program

This is actually very cool...
Blizzard Support

Hilights...
1. Characters on both accounts can summon each other once per hour.
2. While adventuring with your linked friend/family member, you will each gain triple experience.
3. For every two levels the new player earns, the new player can grant one free level-up to a lower-level character played by the veteran player.

If anyone was thinking about trying WoW, now would be a good time. Should be able to level up in now time.