Ranger Thief

[Grayson01]

Is there a feat, like Daring Outlaw, that stacks some of the features of Ranger and Rogue?

[Falcon X]

Don't know if it exists. You might try a Scout/Ranger Hybrid, or do Druid 1/Rogue1/SwashbucklerX
Only feats like what you're looking for I can think of are:
Daring Outlaw (Rogue+Swashbuckler) (CS)
Sacred Outlaw (Rogue+Cleric) (Dragon 357)
Ascetic Rogue (Rogue+Monk) (CA)
Swift Ambusher (Rogue+Scout) (CS)
Swift Ambusher (Scout+Ranger) (CS)

I'll keep digging for feats, but here are a few things that might help off-hand:

Trap Expert ACF from Dungeonscape
Foe Specialist feat from Miniatures Handbook

Prestige Classes:
- Nightsong Enforcer (CA): Full BAB, Sneak Attack, and teamwork abilities.
- Peerless Archer (Silver Marches): Ranged Sneak Attack.
- Scorpion Heritor (SS): If you'r into that kind of thing.
- Divine Seeker (FRCS): If you're into that kind of thing.