At level 3 this guy has:
+4 Str, -2 Int, -2 Wis
Large Size (but no reach? all of the penalties and none of the bonuses? ow

)
Base Speed 40'
2d8 HD (you give skills 3 times, should he get an extra hd?)
+1 BAB
Weapon familiariry: All polearms (I guess this means, 'gains all polearms as martial weapon proficienccy feats)
OathBound
+2 craft (when metalworking), +2 intimidate
6 + 3xint (shouldnt he get 4x the first time?)
+3 F, +0 R, +0 W
+2 natural armor
Unless I am reading this wrong then this guy is incredibly underpowered at level 3. I dont know what oathbound is, so that may make up the difference if it is incredibly cool. Is there somewhere I could find out what it is or is it only in the book?
I know that the dmg usually equates str with double penalties but generally I disagree

Doesnt matter for this guy though, he winds up with a total of 0 which is cool.
I think that a first level character Such as:
Large (with only 5' reach)
+4 Str, -2 Int, -2 Wis
base speed 40
Weapon Familiarity: Polearms
OathBound
+2 craft (when metalworking), +2 intimidate
+2 natural armor
Might be a little much, but not by a whole lot. Making them take the first level with whatever that d8 HD is with no level adjustment would probably put them a little bit underpowered but not for straight barbarian characters who dont care about social niceties
d8, (2+int)x4 skill points, +2 F, +0 R, +0 W, +0 BAB
..
Long post, sorry ;/ Just give me a rating of how powerful or antipowerful oathbound is

Otherwise one level getting pretty much nothing balances out the rest of the abilities in my book.