Feats for sneak attack

[calighis]

Neraph charge is a no brainer, playing a neraph rouge x/ barbarian 1/ scout x with lion totem substitution from phb2 (or complete adventurer, I can never remember)
Is super optimal. It grants you a full attack after a charge with all attacks dealing SA and skirmish against an unflanked opponent.
A rouge scout combo has tons of synergy

 

[Draz]

There are also items that add sneak attack damage, especially in the MIC. I love the Mantle of the Predator, for example (p. 200 MIC).

 

[Anonimonicon]

Are there any feats that allow you to increase the damage die of your sneak attack?

In Tome of Magic the feats Bind Vestige/Improved vestige grant you one power of a vestige of up to 5th level. Andromalious grants 2d6 sneak attack, but you have a possibility of developing his personality.