Neat
As much fun as this sounds there are more ways to skin a cat.
In an old campaign I played (halfling theif, 2e), we came up with another neat way to get backstabs (what sneak attacks were then).
We placed a specially designed harness on my char, basically leather straps like a backpack, though they had handles in the back. Then our Half-Ogre fighter picked my char up by the handles and threw it into combat. Miny Halfling Missle. This let my char backstab anything taller than him and we (the group) decided that he would essentially get a surprise attack cause no one expects a flying, flailing, halfling.
An alternate approach with 3e is to have the small char as a ranger and give it two weapons, like light maces. This is three attacks, 2x weapon and 1x halfling projectile. DM should decide if an attack of oppurtunity/bullrush occurs. Still, easy way to take out some of the bigger enemies in near one shot. Also great against wizards casting spells.