I'll be DMing a super tripper tomorrow:
Half-ogre, 32 Strength, 10' Reach (15' when using his Warshaper ability--from the Complete Warrior), Improved Trip, Knockdown, Combat Reflexes, and something else I can't remember. Every attack he makes that does 10 points of damage or more (his strength bonus is +11) initiates a free trip attempt, with a +25 bonus.
Nothing can get within 15' of him, except tumblers, and none of them can stand toe to toe with a 16th level Barbarian, Fighter, Wolf lodge member, Tribal Defender, Warshaper. His group wil be arriving in Menzoberranzan tomorrow, where there will be many tumbling Swashbuckler-Fighters and Rogue-Fighters.