Well, you get to take the class level as your first level, multiplying the skill points by four. If you want to be stealthy and be able to be the "trapmonkey", I'd suggest ranger with the alternate trapfinding class feature (replaces Track, which you get as a bonus anyway). Swordsage would be great for such a build, and the animal hit dice won't hurt as much as you'll get +1 initiator level from them (the LA is still going to hurt, though). I'd take this later so your starting maneuvers are higher level, though.
The targetteer variant fighter (dragon magazine) is an awesome dip, as it lets you add Dex to damage with ranged attacks. You might be able to combine that with the Hit and Run tactics fighter ACF (Drow of the Underdark) for Dex to damage again. Swordsage grants you Weapon Focus with a bunch of stuff, including daggers, so it sets you up to take Dead Eye (dragon magazine) (which adds Dex to damage yet again) and enter Invisible Thrower.
Overall, it might look like something like this for the first few levels:
RHD2/Rngr1/Ftr1/SwdSg1/InvBld1/Rngr+1/MstThr1/SswdSg+1 (ECL 12)
Feats: Point Blank Shot (1), Rapid Shot (ranger 2), Wpn Focus (retrain to Far Shot at 5th) (flaw), Precise Shot (flaw), Quick Draw (human)(retrain when you get it as a bonus), Dead Eye (3), Discipline Focus (SS1), Darkstalker/Craven/etc (6), Quick Draw (MT1)
Items: Gloves of the Balanced Hands (grant TWF), two feycraft daggers (grant Weapon Finesse, in case you have to melee), a bunch of standard daggers and skiprocks.
Definitely make Dex your highest stat by far (you can get it to damage up to three times). I'd go Con or Int 2nd, and the other 3rd, and then whatever.
You get two bonus ranged exotic weapon proficiencies from Targetteer. Halfling skiprocks are insane, as you get to hit two adjacent people with each one and add sneak attack damage to both. I'd definitely pick that as one of them. Use those if you're facing multiple targets, or daggers against one (you'll get 3x Dex to dmg on daggers but only 2x on the skiprocks, unless you take Weapon Focus with them).