In a tangental, related bit, I thought I would point out a couple of Skill Tricks from Complete Scoundrel that are Pseudo-Featish and very handy for the Sneak-centric Rogue.

{table]Trick Name|Catagory|Prerequisite|Effect
Hidden Blade|Manipulation|Quick Draw, Sleight of Hand 5|Draw hidden weapon as move action; target flat-footed.
Acrobatic Backstab|Movement|Tumble 12|Move through opponents square to make them flat-footed.[/table]