Speaking of tossing around ideas...
Here's a convoluted build I just made up. It doesn't really get anywhere until you have amassed a bunch of feats, but maybe someone will like it:
Human/Azurin/Strongheart Halfling Warblade 1/Exoticist or Targeteer 2/Full BAB 1/Bloodstorm Blade 1/Master Thrower 1.
Ok, you're feat-strapped something fierce.
You have 3 regular feats and 3 bonus feats. The 6th level feat is going to be Brutal Throw.
You need Favored and Primary Contact (Gladiatorial Stables) from Cityscape. The primary advantage is that you get 1 rank into Balance that exceed your normal rank limit. This allows us to pick Bloodstorm Blade one level earlier since it requires 8 ranks in balance normally.
You also need Point Blank Shot. So that one goes in.
Next up, apart from the PBS you need, you are also going to need Weapon Focus (xen'drik or talentia boomerang) and Precise Shot for Master Thrower.
You also need +5 BAB and 4 ranks in sleight of hand, which probably is going to cost you 8 skill points unless someone can find me a Full BAB class with Sleight of Hand as a class skill.
Your first bonus feat after 6th level will be Boomerang Daze, followed by Boomerang Ricochet.
So, that's a lot of loops. What do we get eventually?
Well, you have two returning boomerangs, that deal full STR damage, that might daze up to 4 people per round.
It's not a character I would play as a player, but it makes for a decent NPC.