How can I become immune to the Shaken condition?

[Benly]

The table is official. I believe it's in one of the other books.

Edit:
Also, at that point, play a halfling and take Fearless if you are just going to completely reflavor the race just to get a fear immunity.

Or ask the DM if you can have a variant halfling race that reduces fear effects by one level instead of one of their normal racial benefits. Except for the part where OP said he's playing a warforged anyway so the whole kender discussion is a bit silly unless you plan to reflavor kender into very small, meat-covered warforged.

[snakeman830]

Wan immune to Shaken while stillbeing Warforged?

Warforged Juggernaut works pretty well for that ^.^  Too bad it doesn't advance manifesting.

A Third Eye Conceal will work wonders, though, giving you constant Mind Blank.

Alternatively, Illithid Slayer 9 gives you selective Mind Blank (let beneficial effects through) while psionically focused.  It's also a pretty solid PrC for a manifester.

[McPoyo]

Dip paladin for fear immunity